You are a team lead in The Company. A new CTO has joined this month. There are rumors that he is going to fire your colleagues and hire his own.
He calls you to his office.
He hands you out a piece of paper.
Damn, that's over, he is going to fire you, but wait!
"This is the new structure of IT Department," he said. "Prepare the contracts for new hires and do something with fired."
"OK boss, no problem, but there are hundreds of guys working here. Who exactly is to be fired? And who is to be hired?"
"Listen." He frowns. "You are still a coder, aren't you? Just compare old structure with new one and find the difference!"
Your task is to implement a diff method for comparing two trees with the employee structure.
Method that you should fill in, is in the StructureDiff class.
As a result, the method should return an Changes with three sets:
- fired guys,
- hired guys
- and the guys whose salary has changed.
public class StructureDiff {
public Changes calculate(Employee oldCTO, Employee newCTO){
// your code goes here
throw new NotImplementedException();
}
}We have also prepared bunch of failing tests to make your life easier.
Tools
- Java 8, Groovy, Gradle
- any library you need
Criteria
- code passes all unit tests and is fast
- make your code small, clean and sexy
- leverage lambdas or maybe use some smart tool?
Applying
- fork this repository https://github.com/allegro/jdd-14-dev-contest
- code!
- push a solution to master branch on your fork
- send a short email to
allegrotech.io@allegro.pl, with url of your fork - competition ends at 15:00, October 14'th, the winners will be announced at Allegro booth at 16:55, October 14'th
Jury
Tips
Come to our booth for some tips.
Fame
The best solutions might be published on allegrotech.io/blog.
Awards
- tablet Nexus 7 for the best solution
- Dice+, booby prize
[allegrotech.io](http://allegrotech.io)