Complete day 1

Author: jamiemill

.gitignore

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+.DS_Store

.vscode/settings.json

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+{
+    "deno.enable": true,
+    "deno.unstable": true
+}

days/01.test.ts

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+import { assertEquals } from "https://deno.land/std@0.165.0/testing/asserts.ts";
+import {part1, part2} from "./01.ts";
+
+
+const testDataFromExample =
+`1000
+2000
+3000
+
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000`;
+
+
+Deno.test("Day 1 Part 1", async (t) => {
+    await t.step("example", () => {
+        assertEquals(part1(testDataFromExample), 24000);
+    })
+
+    await t.step("answer", async () => {
+        const input = await Deno.readTextFile(`./days/01.txt`);
+        assertEquals(part1(input), 70374);
+    });
+});
+
+Deno.test("Day 1 Part 2", async (t) => {
+    await t.step("example", () => {
+        assertEquals(part2(testDataFromExample), 45000);
+    })
+
+    await t.step("answer", async () => {
+        const input = await Deno.readTextFile(`./days/01.txt`);
+        assertEquals(part2(input), 204610);
+    });
+});

days/01.ts

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+
+// returns [1000,3000,2000], a list of total calories of each elf
+function parseInput(input:string):any {
+  const elves = [0];
+  input.split("\n").forEach((line:string) => {
+    if (line !== "") {
+      elves[elves.length-1] += parseInt(line);
+    } else {
+      elves.push(0);
+    }
+  })
+  return elves;
+}
+
+function sumArr(arr:number[]):number {
+  return arr.reduce((acc, item) => acc + item, 0);
+}
+
+export function part1(input:string):number {
+  const elves = parseInput(input);  
+  return Math.max(...elves);
+}
+
+function sortDesc (a:number,b:number) {return b-a};
+
+export function part2(input:string):number {
+  const elves = parseInput(input);
+  const top3 =  elves.slice(0).sort(sortDesc).slice(0,3);
+  return sumArr(top3);
+}

days/01.txt

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+{
+    "tasks": {
+        "test": "deno test --watch --allow-read ."
+    }
+}