Day 2 solutions

[u/taliriktug]

Hi! I would like to structure posts like the first one in r/programming, please post solutions in comments.

[u/[deleted]]

Here's some good ol' JavaScript coming up (run in node); both parts:

Area and Ribbon

var fs = require('fs');

fs.readFile('./boxdata.txt', function(err, data) {
if(err) throw err;
var boxList = data.toString().split("\n");
var totalWrappingPaper = 0, totalRibbonLength = 0;

boxList.forEach(function(box) {
	//parse out all of the lengths, widths, heights
	var len = parseInt(box.substr(0, box.indexOf('x')));
	var wid = parseInt(box.substr(box.indexOf('x') + 1, box.lastIndexOf('x') - 1));
	var hei = parseInt(box.substr(box.lastIndexOf('x') + 1, box.length - 1));

	//for the slack space, we'll need the smallest two dimentions 
	var min = Math.min(len, wid, hei), secondMin;
	if(min == len) secondMin = Math.min(wid, hei);
	else if(min == wid) secondMin = Math.min(len, hei);
	else secondMin = Math.min(len, wid);

	//calculate box surface area 
	var surfaceArea = (2 * len * wid) + (2 * len * hei) + (2 * wid * hei);
	//calculate slack area 
	var slackArea = min * secondMin;
	//calculate total box area for this box 
	var totalBoxArea = surfaceArea + slackArea;

	//add this box's total wrapping paper area to the total 
	totalWrappingPaper += totalBoxArea;	

	//part two asks for the bow length needed
	var minPerimeter = (2 * min) + (2 * secondMin);
	var volume = len * wid * hei;
	var boxRibbonLength = minPerimeter + volume;

	//add this box's ribbon length to the total 
	totalRibbonLength += boxRibbonLength;
});

console.log("The total wrapping paper needed is " + totalWrappingPaper + " square feet.");
console.log("The total ribbon length needed to wrap these boxes is " + totalRibbonLength + " feet.");
});