feat(2022-day-01): exposes calorie-based elf sorting

Author: developher-net

2022/day-01/calories.js

@@ -17,6 +17,10 @@ const parseCalorieData = (data) => {
 }
 
 const findElfWithMost = (data) => {
+  return sortElvesByCalories(data)[0] // Sort for the elf with the most calories
+}
+
+const sortElvesByCalories = (data) => {
   const sum = (a, b) => { return a + b }
   const compare = (a, b) => {
     // compare sums of array values for sum-based sorting
@@ -27,10 +31,11 @@ const findElfWithMost = (data) => {
     )
   }
   data.sort(compare)
-  return data[0] // Sort for the elf with the most calories
+  return data
 }
 
 module.exports = {
   findElfWithMost,
-  parseCalorieData
+  parseCalorieData,
+  sortElvesByCalories
 }

2022/day-01/calories.test.js

@@ -1,6 +1,6 @@
 /* eslint-env mocha */
 const { expect } = require('chai')
-const { findElfWithMost, parseCalorieData } = require('./calories')
+const { findElfWithMost, parseCalorieData, sortElvesByCalories } = require('./calories')
 
 const calorieData = `1000
 2000
@@ -39,5 +39,17 @@ describe('--- Day 1: Calorie Counting ---', () => {
           .to.equal(24000)
       })
     })
+    describe('sortElvesByCalories()', () => {
+      it('Sorts the list of elves by calories carried, maximum first', () => {
+        expect(sortElvesByCalories(parsedCalorieData))
+          .to.deep.equal([
+            [7000, 8000, 9000],
+            [5000, 6000],
+            [10000],
+            [1000, 2000, 3000],
+            [4000]
+          ])
+      })
+    })
   })
 })