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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title><![CDATA[Moorberry]]></title>
<link href="http://moorberry.net/atom.xml" rel="self"/>
<link href="http://moorberry.net/"/>
<updated>2014-07-30T13:31:51-05:00</updated>
<id>http://moorberry.net/</id>
<author>
<name><![CDATA[Michael Minter]]></name>
</author>
<generator uri="http://octopress.org/">Octopress</generator>
<entry>
<title type="html"><![CDATA[Search Multiple Directories with cd]]></title>
<link href="http://moorberry.net/blog/search-multiple-directories-with-cd/"/>
<updated>2014-07-30T10:32:00-05:00</updated>
<id>http://moorberry.net/blog/search-multiple-directories-with-cd</id>
<content type="html"><![CDATA[<p>If you use the command line and frequent a particular directory you can set <strong>cd</strong> to scan, not just current, but other directories as well.</p>
<!-- more -->
<p>Modify <strong>~/.bash_profile</strong> by appending directories to the <strong>CDPATH</strong> environment variable.</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'><span class="c"># define base directory for cd command</span>
</span><span class='line'><span class="nb">export </span><span class="nv">CDPATH</span><span class="o">=</span><span class="nv">$CDPATH</span>:<span class="nv">$HOME</span>/Repos
</span></code></pre></td></tr></table></div></figure>
<p>Restart your terminal session and now you can <code>cd projectDir</code>. <strong>cd</strong> will reference any subdirectories in the current directory—as well as <strong>$HOME/Repos</strong>.</p>
<h2>Autotabbing Custom Base Directories</h2>
<p>You can install an additonal library; <strong>bash-completion</strong> to use the <strong>[tab]</strong> key to autocomplete from the <strong>cd</strong> command.</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'>brew install bash-completion
</span></code></pre></td></tr></table></div></figure>
<p>Add the following to <strong>~/.bash_profile</strong>.</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'><span class="c"># add bash-completion</span>
</span><span class='line'><span class="k">if</span> <span class="o">[</span> -f <span class="sb">`</span>brew --prefix<span class="sb">`</span>/etc/bash_completion <span class="o">]</span>; <span class="k">then</span>
</span><span class='line'> . <span class="sb">`</span>brew --prefix<span class="sb">`</span>/etc/bash_completion
</span><span class='line'><span class="k">fi</span>
</span></code></pre></td></tr></table></div></figure>
<p>To install <strong>bash-completion</strong> on other systems and more resources: <a href="https://github.com/bobthecow/git-flow-completion/wiki/Install-Bash-git-completion">https://github.com/bobthecow/git-flow-completion/wiki/Install-Bash-git-completion</a></p>
<h2>Case Insensitive Completion</h2>
<p>Update <strong>~/.inputrc</strong> file to include the following line:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'><span class="nb">set </span>completion-ignore-case on
</span></code></pre></td></tr></table></div></figure>
<p>For hyphens and underscores as well:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'><span class="nb">set </span>completion-map-case on
</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[MySQL Lock Wait Timeout Exceeded]]></title>
<link href="http://moorberry.net/blog/mysql-lock-wait-timeout-exceeded/"/>
<updated>2014-06-17T17:03:00-05:00</updated>
<id>http://moorberry.net/blog/mysql-lock-wait-timeout-exceeded</id>
<content type="html"><![CDATA[<p>What to do when you encounter:</p>
<blockquote><p>ActiveRecord::StatementInvalid: Mysql2::Error: Lock wait timeout exceeded;</p></blockquote>
<!-- more -->
<p>One solution I’ve used, if you have an uber query or series of queries, is to extend the wait timeout.</p>
<p>If you can’t currently restart the server or MySQL, enter the following in the MySQL terminal:</p>
<pre><code>mysql> set GLOBAL wait_timeout=28800;
</code></pre>
<p>This setting will go away when the current MySQL instance is terminated.</p>
<p>To set the wait_timeout parameter permanently, edit your MySQL configuration file:</p>
<pre><code>~$ vim /etc/my.conf
</code></pre>
<p>Insert the following line:</p>
<pre><code>wait_timeout = 28800
</code></pre>
<p>Now restart MySQL:</p>
<pre><code>sudo /etc/init.d/mysql restart
</code></pre>
<p>Or on Redhat:</p>
<pre><code>sudo service mysqld restart
</code></pre>
<p><strong>Notes</strong></p>
<p><strong>wait_timeout</strong><br/>
The number of seconds the server waits for activity on a noninteractive connection before closing it. This timeout applies only to TCP/IP and Unix socket file connections, not to connections made using named pipes, or shared memory.</p>
<p><strong>interactive_timeout</strong><br/>
The number of seconds the server waits for activity on an interactive connection before closing it. An interactive client is defined as a client that uses the CLIENT_INTERACTIVE option to mysql_real_connect().</p>
<p>Can be set like:</p>
<pre><code>interactive_timeout = 28800
</code></pre>
<p><strong>my.cnf</strong><br/>
Possible locations of my.cnf:</p>
<ul>
<li>/etc/my.cnf</li>
<li>/etc/mysql/my.cnf</li>
<li>$MYSQL_HOME/my.cnf</li>
<li>[datadir]/my.cnf</li>
<li>~/.my.cnf</li>
</ul>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Create Linux Install USB on Mac]]></title>
<link href="http://moorberry.net/blog/create-linux-install-usb/"/>
<updated>2014-05-13T11:14:00-05:00</updated>
<id>http://moorberry.net/blog/create-linux-install-usb</id>
<content type="html"><![CDATA[<p>Create a bootable USB drive, for installing Linux, on your Mac.</p>
<!-- more -->
<p>Picking a Linux distro is like picking your favorite flavor of ice cream.</p>
<p>Find an awesome Linux distribution here <a href="http://distrowatch.com">distrowatch.com</a></p>
<h2>Prepare</h2>
<p>Convert the .iso file to .img using the convert option of hdiutil</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso</span></code></pre></td></tr></table></div></figure>
<p><strong>Note:</strong> OS X tends to put the .dmg ending on the output file automatically.</p>
<p>Remove the USB drive from your machine if it’s currently inserted.</p>
<p>Run <code>diskutil list</code> to get the current list of devices.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>diskutil list</span></code></pre></td></tr></table></div></figure>
<p>Insert your flash drive.</p>
<p>Run <code>diskutil list</code> again to determine the device node assigned to your flash media (e.g. /dev/disk1).</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>diskutil list</span></code></pre></td></tr></table></div></figure>
<p><em>insert example output</em></p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>diskutil unmountDisk /dev/diskN</span></code></pre></td></tr></table></div></figure>
<p>Replace <em>N</em> with the disk number from the last command; in the previous example, <em>N</em> would be 1.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m</span></code></pre></td></tr></table></div></figure>
<p>Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located; for example, ./ubuntu.imgor ./ubuntu.dmg).</p>
<ul>
<li>Using /dev/rdisk instead of /dev/disk may be faster</li>
<li>If you see the error dd: Invalid number ‘1m’, you are using GNU dd. Use the same command but replace bs=1m with bs=1M</li>
<li>If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Start the ‘Disk Utility.app’ and unmount (don’t eject) the drive</li>
</ul>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>diskutil eject /dev/diskN</span></code></pre></td></tr></table></div></figure>
<p>and remove your flash media when the command completes.</p>
<h2>Install</h2>
<p>Restart your computer and press alt/option key while the Mac is restarting to choose the USB drive.</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Git Push to Github and Heroku]]></title>
<link href="http://moorberry.net/blog/git-push-github-heroku/"/>
<updated>2014-05-08T22:58:00-05:00</updated>
<id>http://moorberry.net/blog/git-push-github-heroku</id>
<content type="html"><![CDATA[<p>Group assign any git repository, on any git provider, and for as many remotes as you wish.</p>
<!-- more -->
<p><img src="http://moorberry.net/images/posts/remotes.jpg" alt="Remotes Funny" style="width:100%;" /></p>
<p>From your terminal, <code>cd</code> into where your repository is located and run:</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$> git remote -v</span></code></pre></td></tr></table></div></figure>
<p>Should look something like:</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>heroku git@heroku.com:activezoo.git (fetch)
</span><span class='line'>heroku git@heroku.com:activezoo.git (push)
</span><span class='line'>openshift ssh://5340404b5973ca1ff800034d@ruby-activezoo.rhcloud.com/~/git/ruby.git (push)
</span><span class='line'>openshift ssh://5340404b5973ca1ff800034d@ruby-activezoo.rhcloud.com/~/git/ruby.git (fetch)
</span><span class='line'>origin git@github.com:michaelminter/active_zoo.git (push)
</span><span class='line'>origin git@github.com:michaelminter/active_zoo.git (fetch)</span></code></pre></td></tr></table></div></figure>
<p>Find the Github repo. Usually set up under the <strong>origin</strong> label.</p>
<p>To create the group remote, add the following command, with your Github repo address switched out with the one listed.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$> git remote add all git@github.com:michaelminter/test.git</span></code></pre></td></tr></table></div></figure>
<p>Find the Heroku git repo address and switch it out with the repo in this command. Run the command.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$> git remote set-url --add all git@heroku.com:test.git</span></code></pre></td></tr></table></div></figure>
<p>Keep executing the previous command, switching out the git address, to add more repos to the new “all” remote.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$> git remote -v
</span><span class='line'>all git@github.com:michaelminter/active_zoo.git (fetch)
</span><span class='line'>all git@heroku.com:activezoo.git (push)
</span><span class='line'>all git@github.com:michaelminter/active_zoo.git (push)
</span><span class='line'>heroku git@heroku.com:activezoo.git (fetch)
</span><span class='line'>heroku git@heroku.com:activezoo.git (push)
</span><span class='line'>openshift ssh://5340404b5973ca1ff800034d@ruby-activezoo.rhcloud.com/~/git/ruby.git (push)
</span><span class='line'>openshift ssh://5340404b5973ca1ff800034d@ruby-activezoo.rhcloud.com/~/git/ruby.git (fetch)
</span><span class='line'>origin git@github.com:michaelminter/active_zoo.git (push)
</span><span class='line'>origin git@github.com:michaelminter/active_zoo.git (fetch)</span></code></pre></td></tr></table></div></figure>
<p>Now you can push the same code to multiple remotes with one command.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$> git push all [branch]</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Database Version Control with MySQL Utilities]]></title>
<link href="http://moorberry.net/blog/database-version-control/"/>
<updated>2014-04-13T23:30:00-05:00</updated>
<id>http://moorberry.net/blog/database-version-control</id>
<content type="html"><![CDATA[<p>The following steps are meant to capture a snapshot of your development database structure and your staging/production database structure, compare the two, and provide SQL to consolidate the differences.</p>
<!-- more -->
<p>This article relates to one of many methods for <strong>database version control</strong> in a singular or team-based environment.</p>
<h2>MySQL Workbench</h2>
<p>Having <strong>MySQL Workbench</strong> is not mandatory for this process. But it’s a nice interface to consolidate the suite of tools that <strong>MySQL</strong> offers.</p>
<p>Download <a href="http://dev.mysql.com/downloads/tools/workbench/">http://dev.mysql.com/downloads/tools/workbench/</a></p>
<h2>MySQL Utilities</h2>
<p><strong>MySQL Utilities</strong> will install the required programs to finish the fowllowing steps.</p>
<p>Download <a href="http://dev.mysql.com/doc/workbench/en/mysql-utilities.html">http://dev.mysql.com/doc/workbench/en/mysql-utilities.html</a></p>
<h2>Verify MySQL Utilities</h2>
<p>Open <strong>MySQL Workbench</strong>.</p>
<p>Start <strong>MySQL Utilities</strong> from <strong>MySQL Workbench</strong>.</p>
<p><img src="http://dev.mysql.com/doc/workbench/en/images/wb-mysql-utilities-open.png" width="100%" /></p>
<p>The available <strong>MySQL Utilities</strong> programs can be seen in the console output below with the “help” command executed.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
<span class='line-number'>11</span>
<span class='line-number'>12</span>
<span class='line-number'>13</span>
<span class='line-number'>14</span>
<span class='line-number'>15</span>
<span class='line-number'>16</span>
<span class='line-number'>17</span>
<span class='line-number'>18</span>
<span class='line-number'>19</span>
<span class='line-number'>20</span>
<span class='line-number'>21</span>
<span class='line-number'>22</span>
<span class='line-number'>23</span>
<span class='line-number'>24</span>
<span class='line-number'>25</span>
<span class='line-number'>26</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ mysqluc -e "help utilities"
</span><span class='line'>Launching console ...
</span><span class='line'>
</span><span class='line'>Utility Description
</span><span class='line'>---------------- ---------------------------------------------------------
</span><span class='line'>mysqlauditadmin audit log maintenance utility
</span><span class='line'>mysqlauditgrep audit log search utility
</span><span class='line'>mysqldbcompare compare databases for consistency
</span><span class='line'>mysqldbcopy copy databases from one server to another
</span><span class='line'>mysqldbexport export metadata and data from databases
</span><span class='line'>mysqldbimport import metadata and data from files
</span><span class='line'>mysqldiff compare object definitions among objects where the
</span><span class='line'> difference is how db1.obj1 differs from db2.obj2
</span><span class='line'>mysqldiskusage show disk usage for databases
</span><span class='line'>mysqlfailover automatic replication health monitoring and failover
</span><span class='line'>mysqlfrm show CREATE TABLE from .frm files
</span><span class='line'>mysqlindexcheck check for duplicate or redundant indexes
</span><span class='line'>mysqlmetagrep search metadata
</span><span class='line'>mysqlprocgrep search process information
</span><span class='line'>mysqlreplicate establish replication with a master
</span><span class='line'>mysqlrpladmin administration utility for MySQL replication
</span><span class='line'>mysqlrplcheck check replication
</span><span class='line'>mysqlrplshow show slaves attached to a master
</span><span class='line'>mysqlserverclone start another instance of a running server
</span><span class='line'>mysqlserverinfo show server information
</span><span class='line'>mysqluserclone clone a MySQL user account to one or more new users</span></code></pre></td></tr></table></div></figure>
<p>The same can be done by entering <code>mysqluc -e "help utilities"</code> into your console.</p>
<p>If you receive the following error.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>Traceback (most recent call last):
</span><span class='line'> File "/bin/mysqluc", line 23, in <module>
</span><span class='line'> from mysql.utilities.common.options import license_callback, UtilitiesParser
</span><span class='line'>File "/Library/Python/2.7/site-packages/mysql/utilities/common/options.py", line 34, in <module>
</span><span class='line'>from mysql.connector.conversion import MySQLConverter
</span><span class='line'>ImportError: No module named connector.conversion</span></code></pre></td></tr></table></div></figure>
<blockquote><p><strong>ImportError: No module named connector.conversion</strong></p></blockquote>
<p><strong>MySQL Utilities</strong> assumes that the <strong>MySQL Connector</strong> for <strong>Python</strong> has been installed.</p>
<p>Download it here <a href="http://dev.mysql.com/downloads/connector/python/">http://dev.mysql.com/downloads/connector/python/</a></p>
<h2>Compare Databases with mysqldbcompare</h2>
<p>Run <strong>mysqldbcompare</strong>.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ mysqldbcompare --server1=<user>:<password>@<host> --server2=<user>:<password>@localhost dwh_production:dwh_development --run-all-tests --skip-data-check --difftype=sql
</span><span class='line'># server1 on localhost: ... connected.
</span><span class='line'># server2 on localhost: ... connected.
</span><span class='line'># Checking databases dwh_production on server1 and dwh_development on server2
</span><span class='line'>#</span></code></pre></td></tr></table></div></figure>
<p>If you can’t connect to your database directly, but can <strong>SSH</strong> into the platform that the database server is located on, run:</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ ssh -f -N -L 3307:localhost:3306 <user>@<server></span></code></pre></td></tr></table></div></figure>
<p>Run <strong>mysqldbcompare</strong>.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ mysqldbcompare --server1=<user>:<password>@localhost:3307 --server2=<user>:<password>@localhost dwh_production:dwh_development --run-all-tests --skip-data-check --difftype=sql
</span><span class='line'># server1 on localhost: ... connected.
</span><span class='line'># server2 on localhost: ... connected.
</span><span class='line'># Checking databases dwh_production on server1 and dwh_development on server2
</span><span class='line'>#</span></code></pre></td></tr></table></div></figure>
<p><strong>TIP:</strong> Generate a file with the above output.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ mysqldbcompare --server1=<database_user>:<database_password>@localhost:3307 --server2=<user>:<password>@localhost dwh_production:dwh_development --run-all-tests --skip-data-check --difftype=sql >> mysqldbcompare.sql</span></code></pre></td></tr></table></div></figure>
<p>Now you have all the SQL to <strong>ALTER</strong> your production database structure so that it matches up with your development database structure.</p>
<h2>Import</h2>
<p>Import database <strong>ALTER</strong> statements.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ mysqlimport -u <user> -p<password> dwh_production mysqldbcompare.sql</span></code></pre></td></tr></table></div></figure>
<h2>Verify</h2>
<p>Get a <strong>DIFF</strong> of the two databases.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>~$ mysqldbcompare --server1=<database_user>:<database_password>@localhost:3307 --server2=<user>:<password>@localhost dwh_production:dwh_development --run-all-tests --skip-data-check</span></code></pre></td></tr></table></div></figure>
<h2>Resources</h2>
<ul>
<li><a href="http://dev.mysql.com/doc/mysql-utilities/1.3/en/mysqldbcompare.html">http://dev.mysql.com/doc/mysql-utilities/1.3/en/mysqldbcompare.html</a></li>
</ul>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Multi Column Unique Indexes]]></title>
<link href="http://moorberry.net/blog/multi-column-unique-indexes/"/>
<updated>2014-01-15T13:45:00-06:00</updated>
<id>http://moorberry.net/blog/multi-column-unique-indexes</id>
<content type="html"><![CDATA[<p>When a database key is created from a combination of two or more columns, the key is called a <strong>composite key</strong>. Each column may not be unique by itself within the database table but when combined with the other column(s) in the composite key, the combination is unique.</p>
<!-- more -->
<p>The following data is taken from the <strong>Google DFP Report API</strong> example source code.</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
<span class='line-number'>11</span>
<span class='line-number'>12</span>
<span class='line-number'>13</span>
<span class='line-number'>14</span>
<span class='line-number'>15</span>
<span class='line-number'>16</span>
<span class='line-number'>17</span>
<span class='line-number'>18</span>
<span class='line-number'>19</span>
<span class='line-number'>20</span>
<span class='line-number'>21</span>
<span class='line-number'>22</span>
<span class='line-number'>23</span>
<span class='line-number'>24</span>
<span class='line-number'>25</span>
<span class='line-number'>26</span>
<span class='line-number'>27</span>
<span class='line-number'>28</span>
<span class='line-number'>29</span>
</pre></td><td class='code'><pre><code class='sql'><span class='line'><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="o">`</span><span class="n">src_dfp</span><span class="o">`</span> <span class="p">(</span>
</span><span class='line'> <span class="o">`</span><span class="n">id</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="n">unsigned</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="n">AUTO_INCREMENT</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">ad_unit_1</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">ad_unit_2</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">ad_unit_id_1</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">ad_unit_id_2</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">advertiser_id</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">advertiser_name</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">creative_id</span><span class="o">`</span> <span class="nb">bigint</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">creative_name</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="nb">date</span><span class="o">`</span> <span class="nb">date</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_cost_per_unit</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_cost_type</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_end_date_time</span><span class="o">`</span> <span class="n">datetime</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_id</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_name</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_start_date_time</span><span class="o">`</span> <span class="n">datetime</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">line_item_type</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">merged_ad_server_clicks</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">merged_ad_server_impressions</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">order_end_date_time</span><span class="o">`</span> <span class="n">datetime</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">order_id</span><span class="o">`</span> <span class="nb">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">order_name</span><span class="o">`</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">COLLATE</span> <span class="n">utf8_unicode_ci</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">order_start_date_time</span><span class="o">`</span> <span class="n">datetime</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="o">`</span><span class="n">created_at</span><span class="o">`</span> <span class="n">datetime</span> <span class="k">DEFAULT</span> <span class="n">NOW</span><span class="p">(),</span>
</span><span class='line'> <span class="o">`</span><span class="n">updated_at</span><span class="o">`</span> <span class="n">datetime</span> <span class="k">DEFAULT</span> <span class="k">NULL</span><span class="p">,</span>
</span><span class='line'> <span class="k">PRIMARY</span> <span class="k">KEY</span> <span class="p">(</span><span class="o">`</span><span class="n">id</span><span class="o">`</span><span class="p">),</span>
</span><span class='line'> <span class="k">UNIQUE</span> <span class="k">KEY</span> <span class="o">`</span><span class="n">composite_dfp</span><span class="o">`</span> <span class="p">(</span><span class="o">`</span><span class="nb">date</span><span class="o">`</span><span class="p">,</span><span class="o">`</span><span class="n">ad_unit_id_1</span><span class="o">`</span><span class="p">,</span><span class="o">`</span><span class="n">ad_unit_id_2</span><span class="o">`</span><span class="p">,</span><span class="o">`</span><span class="n">advertiser_id</span><span class="o">`</span><span class="p">,</span><span class="o">`</span><span class="n">creative_id</span><span class="o">`</span><span class="p">,</span><span class="o">`</span><span class="n">line_item_id</span><span class="o">`</span><span class="p">,</span><span class="o">`</span><span class="n">order_id</span><span class="o">`</span><span class="p">)</span>
</span><span class='line'><span class="p">)</span> <span class="n">ENGINE</span><span class="o">=</span><span class="n">InnoDB</span> <span class="k">DEFAULT</span> <span class="n">CHARSET</span><span class="o">=</span><span class="n">utf8</span> <span class="k">COLLATE</span><span class="o">=</span><span class="n">utf8_unicode_ci</span><span class="p">;</span>
</span></code></pre></td></tr></table></div></figure>
<p>Or to modify an existing table:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='sql'><span class='line'><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">src_dfp</span> <span class="k">ADD</span> <span class="k">UNIQUE</span> <span class="k">index</span> <span class="n">composite_dfp</span> <span class="p">(</span><span class="nb">date</span><span class="p">,</span> <span class="n">ad_unit_id_1</span><span class="p">,</span> <span class="n">ad_unit_id_2</span><span class="p">,</span> <span class="n">advertiser_id</span><span class="p">,</span> <span class="n">creative_id</span><span class="p">,</span> <span class="n">line_item_id</span><span class="p">,</span> <span class="n">order_id</span><span class="p">);</span>
</span></code></pre></td></tr></table></div></figure>
<p></p>
<p>Which will generate these keys:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
<span class='line-number'>11</span>
<span class='line-number'>12</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'>+------------+---------------+-------------------+---------------+-----------+-------------+----------+--------+
</span><span class='line'>| Non Unique | Key Name | Sequence in Index | Column Name | Collation | Cardinality | Sub Part | Packed |
</span><span class='line'>+------------+---------------+-------------------+---------------+-----------+-------------+----------+--------+
</span><span class='line'>| 0 | PRIMARY | 1 | id | A | 0 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 1 | date | A | 1 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 2 | ad_unit_id_1 | A | 2 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 3 | ad_unit_id_2 | A | 3 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 4 | advertiser_id | A | 4 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 5 | creative_id | A | 5 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 6 | line_item_id | A | 6 | NULL | NULL |
</span><span class='line'>| 0 | composite_dfp | 7 | order_id | A | 7 | NULL | NULL |
</span><span class='line'>+------------+---------------+-------------------+---------------+-----------+-------------+----------+--------+
</span></code></pre></td></tr></table></div></figure>
<p><em>Don’t let the color highlighting above fool you. <strong>date</strong> is another column in the table.</em></p>
<p>Now, if you try to rerun the same import against existing data, you’ll receive the following error message: <code>Duplicate entry '2014-01-14-83243539-236269939-15980539-32298017059-67086499-1643' for key 'composite_dfp'</code></p>
<p>A <strong>UNIQUE</strong> index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. This constraint does not apply to NULL values <strong>except for the BDB storage engine</strong>. For other engines, a UNIQUE index allows multiple NULL values for columns that can contain NULL. <a href="http://dev.mysql.com/doc/refman/5.0/en/create-index.html">Document Source</a></p>
<h2>MySQL Workbench</h2>
<p><strong>1.</strong> Go to the edit window for the table you’re working on</p>
<p><img src="http://moorberry.net/images/posts/mysql-workbench.jpg" alt="MySQL Workbench" width="100%" /></p>
<p><strong>2.</strong> Add a new index in the far-left screen by clicking on the new index row and giving the new index a name<br />
<strong>3.</strong> Select the <strong>UNIQUE</strong> type<br />
<strong>4.</strong> Check all of the corresponding index columns to the right</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Postgres: Search and Sort by Radial Distance]]></title>
<link href="http://moorberry.net/blog/postgres-search-distance/"/>
<updated>2013-12-11T13:01:00-06:00</updated>
<id>http://moorberry.net/blog/postgres-search-distance</id>
<content type="html"><![CDATA[<p>Request users by radial distance and sort by nearest to farthest, vice versa, or whatever other attributes you’d like to include.</p>
<!-- more -->
<p>Searching for a user by distance, in your database, is easy with <strong>Postgres</strong>. Just create a users table with, at minimum, columns named <em>latitude</em> and <em>longitude</em>.</p>
<h2>Data</h2>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'><span class="nv">postgres</span><span class="o">=</span><span class="c"># SELECT * FROM users;</span>
</span><span class='line'>+----+------+----------+-----------+
</span><span class='line'>| id | name | latitude | longitude |
</span><span class='line'>+----+------+----------+-----------+
</span></code></pre></td></tr></table></div></figure>
<h2>SQL</h2>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
</pre></td><td class='code'><pre><code class='sql'><span class='line'><span class="k">SELECT</span> <span class="n">name</span><span class="p">,</span> <span class="n">distance</span>
</span><span class='line'><span class="k">FROM</span>
</span><span class='line'><span class="p">(</span> <span class="k">SELECT</span> <span class="n">name</span><span class="p">,</span> <span class="p">((</span><span class="n">ACOS</span><span class="p">(</span><span class="n">SIN</span><span class="p">(</span><span class="o">#</span><span class="err">{</span><span class="n">latitude</span><span class="err">}</span> <span class="o">*</span> <span class="n">PI</span><span class="p">()</span> <span class="o">/</span> <span class="mi">180</span><span class="p">)</span> <span class="o">*</span> <span class="n">SIN</span><span class="p">(</span><span class="n">u</span><span class="p">.</span><span class="n">latitude</span> <span class="o">*</span> <span class="n">PI</span><span class="p">()</span> <span class="o">/</span> <span class="mi">180</span><span class="p">)</span> <span class="o">+</span> <span class="n">COS</span><span class="p">(</span><span class="o">#</span><span class="err">{</span><span class="n">latitude</span><span class="err">}</span> <span class="o">*</span> <span class="n">PI</span><span class="p">()</span> <span class="o">/</span> <span class="mi">180</span><span class="p">)</span> <span class="o">*</span> <span class="n">COS</span><span class="p">(</span><span class="n">u</span><span class="p">.</span><span class="n">latitude</span> <span class="o">*</span> <span class="n">PI</span><span class="p">()</span> <span class="o">/</span> <span class="mi">180</span><span class="p">)</span> <span class="o">*</span> <span class="n">COS</span><span class="p">((</span><span class="o">#</span><span class="err">{</span><span class="n">longitude</span><span class="err">}</span> <span class="o">-</span> <span class="n">u</span><span class="p">.</span><span class="n">longitude</span><span class="p">)</span> <span class="o">*</span> <span class="n">PI</span><span class="p">()</span> <span class="o">/</span> <span class="mi">180</span><span class="p">))</span> <span class="o">*</span> <span class="mi">180</span> <span class="o">/</span> <span class="n">PI</span><span class="p">())</span> <span class="o">*</span> <span class="mi">60</span> <span class="o">*</span> <span class="mi">1</span><span class="p">.</span><span class="mi">1515</span><span class="p">)</span> <span class="k">as</span> <span class="n">distance</span>
</span><span class='line'><span class="k">FROM</span> <span class="n">users</span> <span class="n">u</span> <span class="p">)</span> <span class="n">d</span>
</span><span class='line'><span class="k">WHERE</span> <span class="n">distance</span> <span class="o"><=</span> <span class="mi">5</span>
</span><span class='line'><span class="k">ORDER</span> <span class="k">BY</span> <span class="n">distance</span> <span class="k">ASC</span><span class="p">;</span>
</span></code></pre></td></tr></table></div></figure>
<p>Matches all users <code>WHERE distance <= 5</code> (less than or equal to five <strong>miles</strong>).</p>
<p>To change the distance to kilometers—multiply the output number by 1.609344 (1 mile == 1.609344 kilometers).</p>
<p>Replace <code>#{latitude}</code> with the value for the latitude you want to match against the database and do the same for <code>#{longitude}</code></p>
<p>This will work in any SQL relational database, including <strong>MySQL</strong> and <strong>Oracle</strong>.</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[CSV Special Character]]></title>
<link href="http://moorberry.net/blog/csv-special-character/"/>
<updated>2013-10-08T23:52:00-05:00</updated>
<id>http://moorberry.net/blog/csv-special-character</id>
<content type="html"><![CDATA[<p>Separate CSV data with a special character (example: thorn þ).</p>
<!-- more -->
<p><strong>Google DFP</strong> (Double-click for Publishers) uses a special character in their CSV exports. Specifically the thorn character and it’s a pain. But Ruby can make it better.</p>
<p>You can skip to the bottom of this article for the neccessary code or read on from here for more details about figuring out the path to certainty.</p>
<h2>Unicode</h2>
<p>Find the unicode character. For my example the thorn character <strong>þ</strong> is represented as <strong>u00FE</strong>.</p>
<h3>List Encoding Types available to Ruby 2</h3>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'>2.0.0p0 :001 > Encoding.name_list
</span><span class='line'> <span class="o">=</span>> <span class="o">[</span><span class="s2">"ASCII-8BIT"</span>, <span class="s2">"UTF-8"</span>, <span class="s2">"US-ASCII"</span>, <span class="s2">"Big5"</span>, <span class="s2">"Big5-HKSCS"</span>, <span class="s2">"Big5-UAO"</span>, <span class="s2">"CP949"</span>, <span class="s2">"Emacs-Mule"</span>, <span class="s2">"EUC-JP"</span>, <span class="s2">"EUC-KR"</span>, <span class="s2">"EUC-TW"</span>, <span class="s2">"GB18030"</span>, <span class="s2">"GBK"</span>, <span class="s2">"ISO-8859-1"</span>, <span class="s2">"ISO-8859-2"</span>, <span class="s2">"ISO-8859-3"</span>, <span class="s2">"ISO-8859-4"</span>, <span class="s2">"ISO-8859-5"</span>, <span class="s2">"ISO-8859-6"</span>, <span class="s2">"ISO-8859-7"</span>, <span class="s2">"ISO-8859-8"</span>, <span class="s2">"ISO-8859-9"</span>, <span class="s2">"ISO-8859-10"</span>, <span class="s2">"ISO-8859-11"</span>, <span class="s2">"ISO-8859-13"</span>, <span class="s2">"ISO-8859-14"</span>, <span class="s2">"ISO-8859-15"</span>, <span class="s2">"ISO-8859-16"</span>, <span class="s2">"KOI8-R"</span>, <span class="s2">"KOI8-U"</span>, <span class="s2">"Shift_JIS"</span>, <span class="s2">"UTF-16BE"</span>, <span class="s2">"UTF-16LE"</span>, <span class="s2">"UTF-32BE"</span>, <span class="s2">"UTF-32LE"</span>, <span class="s2">"Windows-31J"</span>, <span class="s2">"Windows-1251"</span>, <span class="s2">"BINARY"</span>, <span class="s2">"IBM437"</span>, <span class="s2">"CP437"</span>, <span class="s2">"IBM737"</span>, <span class="s2">"CP737"</span>, <span class="s2">"IBM775"</span>, <span class="s2">"CP775"</span>, <span class="s2">"CP850"</span>, <span class="s2">"IBM850"</span>, <span class="s2">"IBM852"</span>, <span class="s2">"CP852"</span>, <span class="s2">"IBM855"</span>, <span class="s2">"CP855"</span>, <span class="s2">"IBM857"</span>, <span class="s2">"CP857"</span>, <span class="s2">"IBM860"</span>, <span class="s2">"CP860"</span>, <span class="s2">"IBM861"</span>, <span class="s2">"CP861"</span>, <span class="s2">"IBM862"</span>, <span class="s2">"CP862"</span>, <span class="s2">"IBM863"</span>, <span class="s2">"CP863"</span>, <span class="s2">"IBM864"</span>, <span class="s2">"CP864"</span>, <span class="s2">"IBM865"</span>, <span class="s2">"CP865"</span>, <span class="s2">"IBM866"</span>, <span class="s2">"CP866"</span>, <span class="s2">"IBM869"</span>, <span class="s2">"CP869"</span>, <span class="s2">"Windows-1258"</span>, <span class="s2">"CP1258"</span>, <span class="s2">"GB1988"</span>, <span class="s2">"macCentEuro"</span>, <span class="s2">"macCroatian"</span>, <span class="s2">"macCyrillic"</span>, <span class="s2">"macGreek"</span>, <span class="s2">"macIceland"</span>, <span class="s2">"macRoman"</span>, <span class="s2">"macRomania"</span>, <span class="s2">"macThai"</span>, <span class="s2">"macTurkish"</span>, <span class="s2">"macUkraine"</span>, <span class="s2">"CP950"</span>, <span class="s2">"Big5-HKSCS:2008"</span>, <span class="s2">"CP951"</span>, <span class="s2">"stateless-ISO-2022-JP"</span>, <span class="s2">"eucJP"</span>, <span class="s2">"eucJP-ms"</span>, <span class="s2">"euc-jp-ms"</span>, <span class="s2">"CP51932"</span>, <span class="s2">"EUC-JP-2004"</span>, <span class="s2">"EUC-JISX0213"</span>, <span class="s2">"eucKR"</span>, <span class="s2">"eucTW"</span>, <span class="s2">"GB2312"</span>, <span class="s2">"EUC-CN"</span>, <span class="s2">"eucCN"</span>, <span class="s2">"GB12345"</span>, <span class="s2">"CP936"</span>, <span class="s2">"ISO-2022-JP"</span>, <span class="s2">"ISO2022-JP"</span>, <span class="s2">"ISO-2022-JP-2"</span>, <span class="s2">"ISO2022-JP2"</span>, <span class="s2">"CP50220"</span>, <span class="s2">"CP50221"</span>, <span class="s2">"ISO8859-1"</span>, <span class="s2">"Windows-1252"</span>, <span class="s2">"CP1252"</span>, <span class="s2">"ISO8859-2"</span>, <span class="s2">"Windows-1250"</span>, <span class="s2">"CP1250"</span>, <span class="s2">"ISO8859-3"</span>, <span class="s2">"ISO8859-4"</span>, <span class="s2">"ISO8859-5"</span>, <span class="s2">"ISO8859-6"</span>, <span class="s2">"Windows-1256"</span>, <span class="s2">"CP1256"</span>, <span class="s2">"ISO8859-7"</span>, <span class="s2">"Windows-1253"</span>, <span class="s2">"CP1253"</span>, <span class="s2">"ISO8859-8"</span>, <span class="s2">"Windows-1255"</span>, <span class="s2">"CP1255"</span>, <span class="s2">"ISO8859-9"</span>, <span class="s2">"Windows-1254"</span>, <span class="s2">"CP1254"</span>, <span class="s2">"ISO8859-10"</span>, <span class="s2">"ISO8859-11"</span>, <span class="s2">"TIS-620"</span>, <span class="s2">"Windows-874"</span>, <span class="s2">"CP874"</span>, <span class="s2">"ISO8859-13"</span>, <span class="s2">"Windows-1257"</span>, <span class="s2">"CP1257"</span>, <span class="s2">"ISO8859-14"</span>, <span class="s2">"ISO8859-15"</span>, <span class="s2">"ISO8859-16"</span>, <span class="s2">"CP878"</span>, <span class="s2">"MacJapanese"</span>, <span class="s2">"MacJapan"</span>, <span class="s2">"ASCII"</span>, <span class="s2">"ANSI_X3.4-1968"</span>, <span class="s2">"646"</span>, <span class="s2">"UTF-7"</span>, <span class="s2">"CP65000"</span>, <span class="s2">"CP65001"</span>, <span class="s2">"UTF8-MAC"</span>, <span class="s2">"UTF-8-MAC"</span>, <span class="s2">"UTF-8-HFS"</span>, <span class="s2">"UTF-16"</span>, <span class="s2">"UTF-32"</span>, <span class="s2">"UCS-2BE"</span>, <span class="s2">"UCS-4BE"</span>, <span class="s2">"UCS-4LE"</span>, <span class="s2">"CP932"</span>, <span class="s2">"csWindows31J"</span>, <span class="s2">"SJIS"</span>, <span class="s2">"PCK"</span>, <span class="s2">"CP1251"</span>, <span class="s2">"UTF8-DoCoMo"</span>, <span class="s2">"SJIS-DoCoMo"</span>, <span class="s2">"UTF8-KDDI"</span>, <span class="s2">"SJIS-KDDI"</span>, <span class="s2">"ISO-2022-JP-KDDI"</span>, <span class="s2">"stateless-ISO-2022-JP-KDDI"</span>, <span class="s2">"UTF8-SoftBank"</span>, <span class="s2">"SJIS-SoftBank"</span>, <span class="s2">"locale"</span>, <span class="s2">"external"</span>, <span class="s2">"filesystem"</span>, <span class="s2">"internal"</span><span class="o">]</span>
</span></code></pre></td></tr></table></div></figure>
<h3>Determine Encoding Type</h3>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Encoding</span><span class="o">.</span><span class="n">name_list</span><span class="o">.</span><span class="n">each</span> <span class="k">do</span> <span class="o">|</span><span class="n">encoding</span><span class="o">|</span>
</span><span class='line'> <span class="no">CSV</span><span class="o">.</span><span class="n">foreach</span><span class="p">(</span><span class="n">file_path</span><span class="p">,</span> <span class="p">{</span> <span class="n">encoding</span><span class="ss">:encoding</span><span class="p">,</span> <span class="ss">:col_sep</span> <span class="o">=></span> <span class="s2">"\u00FE"</span> <span class="p">})</span> <span class="k">do</span> <span class="o">|</span><span class="n">row</span><span class="o">|</span>
</span><span class='line'> <span class="nb">puts</span> <span class="s2">"===== </span><span class="si">#{</span><span class="n">encoding</span><span class="si">}</span><span class="s2"> ====="</span>
</span><span class='line'> <span class="nb">puts</span> <span class="n">row</span><span class="o">.</span><span class="n">inspect</span>
</span><span class='line'> <span class="k">break</span>
</span><span class='line'> <span class="k">end</span>
</span><span class='line'><span class="k">end</span>
</span></code></pre></td></tr></table></div></figure>
<h3>Use Thorn as Delimiter in CSV</h3>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">CSV</span><span class="o">.</span><span class="n">foreach</span><span class="p">(</span><span class="n">file_path</span><span class="p">,</span> <span class="p">{</span> <span class="n">encoding</span><span class="ss">:'ISO-8859-1'</span><span class="p">,</span> <span class="ss">:col_sep</span> <span class="o">=></span> <span class="s2">"\u00FE"</span> <span class="p">})</span> <span class="k">do</span> <span class="o">|</span><span class="n">row</span><span class="o">|</span>
</span><span class='line'> <span class="c1"># your code here</span>
</span><span class='line'><span class="k">end</span>
</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Rails 2 and acts_as_paranoid]]></title>
<link href="http://moorberry.net/blog/rails-2-acts-as-paranoid/"/>
<updated>2013-08-15T16:31:00-05:00</updated>
<id>http://moorberry.net/blog/rails-2-acts-as-paranoid</id>
<content type="html"><![CDATA[<p>Overrides some basic Active Record methods for the current model so that calling #destroy sets a <em>deleted_at</em> field to the current timestamp.</p>
<!-- more -->
<h2>Setup</h2>
<p><strong>Create migration file</strong></p>
<p>acts_as_paranoid, by default, assumes the table has a <em>deleted_at</em> date/time field. Most normal model operations will work, but there will be some oddities.</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$ script/server generate migration deleted_at:datetime</span></code></pre></td></tr></table></div></figure>
<p>And then modify your migration file (app/db/migrations/000000000000_add_deleted_at…rb)to look something like:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="k">class</span> <span class="nc">AddDeletedAtToWidgets</span> <span class="o"><</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">Migration</span>
</span><span class='line'> <span class="k">def</span> <span class="nc">self</span><span class="o">.</span><span class="nf">up</span>
</span><span class='line'> <span class="n">add_column</span> <span class="ss">:widgets</span><span class="p">,</span> <span class="ss">:deleted_at</span><span class="p">,</span> <span class="ss">:datetime</span><span class="p">,</span> <span class="ss">:null</span> <span class="o">=></span> <span class="kp">true</span>
</span><span class='line'> <span class="k">end</span>
</span><span class='line'>
</span><span class='line'> <span class="k">def</span> <span class="nc">self</span><span class="o">.</span><span class="nf">down</span>
</span><span class='line'> <span class="n">remove_column</span> <span class="ss">:widgets</span><span class="p">,</span> <span class="ss">:deleted_at</span>
</span><span class='line'> <span class="k">end</span>
</span><span class='line'><span class="k">end</span>
</span></code></pre></td></tr></table></div></figure>
<p><strong>Add the gem source to your Gemfile</strong> (app/Gemfile)</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="n">gem</span> <span class="s1">'acts_as_paranoid'</span><span class="p">,</span> <span class="ss">:git</span> <span class="o">=></span> <span class="s1">'git://github.com/technoweenie/acts_as_paranoid.git'</span><span class="p">,</span> <span class="ss">:branch</span> <span class="o">=></span> <span class="s1">'integration_gem'</span>
</span></code></pre></td></tr></table></div></figure>
<p><strong>Run bundler</strong></p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="err">$</span> <span class="n">bundle</span> <span class="n">install</span>
</span></code></pre></td></tr></table></div></figure>
<p><strong>Add the requestor to your model</strong> (app/models/widgets.rb)</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="k">class</span> <span class="nc">Widget</span> <span class="o"><</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">Base</span>
</span><span class='line'> <span class="n">acts_as_paranoid</span>
</span><span class='line'><span class="k">end</span>
</span></code></pre></td></tr></table></div></figure>
<p>If you’d like to set a <strong>custom column for acts_as_paranoid</strong> just use the following options in your class method:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="n">acts_as_paranoid</span> <span class="ss">:with</span> <span class="o">=></span> <span class="s1">'destroyed_at'</span>
</span></code></pre></td></tr></table></div></figure>
<h2>Use</h2>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="ss">:all</span><span class="p">)</span>
</span><span class='line'><span class="c1"># => SELECT * FROM widgets WHERE widgets.deleted_at IS NULL</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="ss">:first</span><span class="p">,</span> <span class="ss">:conditions</span> <span class="o">=></span> <span class="o">[</span><span class="s1">'title = ?'</span><span class="p">,</span> <span class="s1">'test'</span><span class="o">]</span><span class="p">,</span> <span class="ss">:order</span> <span class="o">=></span> <span class="s1">'title'</span><span class="p">)</span>
</span><span class='line'><span class="c1"># => SELECT * FROM widgets WHERE widgets.deleted_at IS NULL AND title = 'test' ORDER BY title LIMIT 1</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">find_with_deleted</span><span class="p">(</span><span class="ss">:all</span><span class="p">)</span>
</span><span class='line'><span class="c1"># => SELECT * FROM widgets</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="ss">:all</span><span class="p">,</span> <span class="ss">:with_deleted</span> <span class="o">=></span> <span class="kp">true</span><span class="p">)</span>
</span><span class='line'><span class="c1"># => SELECT * FROM widgets</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">find_with_deleted</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="o">.</span><span class="n">deleted?</span>
</span><span class='line'><span class="c1"># => Returns true if the record was previously destroyed, false if not </span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">count</span>
</span><span class='line'><span class="c1"># => SELECT COUNT(*) FROM widgets WHERE widgets.deleted_at IS NULL</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">count</span> <span class="o">[</span><span class="s1">'title = ?'</span><span class="p">,</span> <span class="s1">'test'</span><span class="o">]</span>
</span><span class='line'><span class="c1"># => SELECT COUNT(*) FROM widgets WHERE widgets.deleted_at IS NULL AND title = 'test'</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">count_with_deleted</span>
</span><span class='line'><span class="c1"># => SELECT COUNT(*) FROM widgets</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">delete_all</span>
</span><span class='line'><span class="c1"># => UPDATE widgets SET deleted_at = '2013-08-15 13:01:59'</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="no">Widget</span><span class="o">.</span><span class="n">delete_all!</span>
</span><span class='line'><span class="c1"># => DELETE FROM widgets</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="vi">@widget</span><span class="o">.</span><span class="n">destroy</span>
</span><span class='line'><span class="c1"># => UPDATE widgets SET deleted_at = '2013-08-15 13:01:59' WHERE id = 1</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="vi">@widget</span><span class="o">.</span><span class="n">destroy!</span>
</span><span class='line'><span class="c1"># => DELETE FROM widgets WHERE id = 1</span>
</span></code></pre></td></tr></table></div></figure>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='ruby'><span class='line'><span class="vi">@widget</span><span class="o">.</span><span class="n">recover!</span>
</span><span class='line'><span class="c1"># => UPDATE widgets SET deleted_at = NULL WHERE id = 1</span>
</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Android Javascript Debugging]]></title>
<link href="http://moorberry.net/blog/android-javascript-debugging/"/>
<updated>2013-08-12T11:23:00-05:00</updated>
<id>http://moorberry.net/blog/android-javascript-debugging</id>
<content type="html"><![CDATA[<p>As a web developer, I have to use <code>console.log</code> a lot to see what’s going on with Javascript in my web applications, and Android Browser does <strong>not</strong> make this <strong>an easy task</strong>.</p>
<!-- more -->
<p>Initial searches brought up articles suggesting use of the Android SDK, plugging my phone into my computer, setting up the debug bridge, et cetera. That’s a lot of work.</p>
<p>There is a way to do <strong>Javascript debugging</strong> entirely on your phone <strong>without the Android SDK</strong>.</p>
<p><strong>Install</strong> a log viewer from the Android Market (example: <em>logcat</em>). This shows all of your systems log messages. Most log viewers will let you search/filter. <strong>Search</strong> for the term, ”<em>browser</em>”. All <code>console.log</code> messages will show up using this keyword.</p>
<p>One difference from desktop web inspectors: Android Browser <strong>only prints the first argument</strong> from <code>console.log</code>. So instead of:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='javascript'><span class='line'><span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s2">"here's my variable "</span><span class="p">,</span> <span class="kd">var</span><span class="p">);</span>
</span></code></pre></td></tr></table></div></figure>
<p>you should write it like:</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='javascript'><span class='line'><span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s2">"here's my variable "</span> <span class="o">+</span> <span class="kd">var</span><span class="p">);</span>
</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[OpenOffice: Merge and Sort Data]]></title>
<link href="http://moorberry.net/blog/openoffice-merge-and-sort-data/"/>
<updated>2013-05-14T22:55:00-05:00</updated>
<id>http://moorberry.net/blog/openoffice-merge-and-sort-data</id>
<content type="html"><![CDATA[<p>You need to <strong>construct an array using a list of pre-existing values</strong> but firstly have to <strong>sort the order</strong> of that list.</p>
<!--more-->
<p>There are plenty of alternatives but I enjoy using <a href="http://www.openoffice.org/" target="_blank" title="OpenOffice"><strong>OpenOffice</strong></a> for these simple string inclusions.</p>
<p>OpenOffice is <strong>open source</strong> and available for use on <strong>all major operating systems</strong>.</p>
<!--## Let's Get Started-->
<h3>Collect Data</h3>
<p>Copy your list of values.</p>
<p>Select the top cell in the column you want your list to reside.</p>
<p><em>When you paste the values in OpenOffice, as long as they’re separated by a line break, OpenOffice will automatically separate each value into a new row of whichever column you’ve designated.</em></p>
<h3>Sort</h3>
<p>Sort the list by hilighting the data and perform the following:</p>
<p><code>Data > Sort > Options</code></p>
<p>Unselect the checkbox labeled ”<em>Range contains column labels.</em>”</p>
<p>Click <code>OK</code></p>
<p><em>This option prevents column headers from being sorted with the rest of the data. Since we don’t have any column headers, like in a CSV file, we need to deactivate this feature.</em></p>
<p><img src="http://moorberry.net/images/posts/openoffice-1.jpg" alt="OpenOffice" width="100%" /></p>
<h3>Prepare</h3>
<p>Create the prepending or appending content at the top of the column to the left or right of the working list.</p>
<p>Point your cursor to the bottom-right corner of the cell you just filled, hold down your left mouse button, and move downwards to the bottom of the working column.</p>
<p><em>This action will copy the active cell to all of the other cells touched by your hover action. Do this over again for further columns.</em></p>
<h3>Merge</h3>
<p>Use the following Calc function in the column that you want the new data to be returned.</p>