Advent of Code Day 2 - Ember Solver

application.controller.js

import Ember from 'ember';


const BoxToWrap = Ember.Object.extend({
  length: 0,
  height: 0,
  width: 0,
  sides: Ember.computed('length', 'width', 'height', function(){
    const dims = ['length', 'width', 'height'];
    const sides = [];
    dims.forEach(dim => {
      let newSides = dims.filter(otherDim => dim != otherDim).map(
          otherDim => this.get(dim) * this.get(otherDim)
        );
      sides.pushObjects(newSides);
    });
    return sides;
  }),

  smallestSide: Ember.computed.min('sides'),
  totalSurfaceArea: Ember.computed('sides', 'smallestSide', function(){
   let result = 0;
   this.get('sides').forEach(x => result += x);
   result += this.get('smallestSide');
   return result;
  })
});

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  input: '',
  boxes: Ember.computed('input', function(){
    const dims = this.get('input').split('\n');
    return !!dims ? dims.map(dim => {
       let [length, height, width] = dim.split('x');
       return BoxToWrap.create({length, height, width});
    }) : [];
    
  }),
  totalPaperRequired: Ember.computed('boxes', function(){
    let x = 0;
    this.get('boxes').forEach(b => x += b.get('totalSurfaceArea'));
 		return x;
  })
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
Paste Dimensions Here:
{{textarea value=input}}
<br>

You need {{totalPaperRequired}} square feet of wrapping paper.

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}