railsstudent

// Sorry, I cheated. 
// Idea comes from http://www.geeksforgeeks.org/factorial-large-number/
function factorial(n){
  // Add some code
  if (n < 0) { return null; }
  
  var factArray = [1];
  var factSize = 1;
  var carry;
  var prod;

railsstudent

function VendingMachine(coins) {
  this.coins = coins;
}

VendingMachine.prototype.calculateCredit = function(credit) {
  var total_credit = 0;
  for (var value in credit) {
    if ((this.coins[value] != null) || (typeof this.coins[value] !== "undefined")) {
      total_credit += value * credit[value];
    } 

railsstudent

function solution(input, markers){
  var comments = input.split('\n');
  for (var i in markers) {
    for (var j in comments) {
      var line = null;
      var idx = comments[j].indexOf(markers[i]);
      if (idx >= 0) {
        comments[j] = comments[j].substring(0, idx).trim();
      } 
    }

railsstudent

Array.prototype.sameStructureAs = function (other) {
    // Return 'true' if and only if 'other' has the same
    // nesting structure as 'this'.

    // Note: You are given a function isArray(o) that returns
    // whether its argument is an array.
    if (this.length !== other.length) {
      return false;
    }
    for (var i = 0; i < this.length; i++) {

railsstudent

function loop_size(node){
  var visitedNodes = [];
  var idx = -1;
  while (node != null) {
    idx = visitedNodes.indexOf(node);
    if (idx < 0) {
      visitedNodes.push(node);
    } else {
      break;
    }

railsstudent

calc = (expr) ->
  # Your awesome code here
  if expr is "" then return 0
  stack = []
  tokens = expr.split(' ')
  for token in tokens
    if token in ['+','-', '*', '/'] 
      # pop the last two values, calculate the total and push the result back
      operands = stack.splice(stack.length - 2, 2)
      result = 0

railsstudent

LCS = (x, y) ->
  lcsArray = []
  lcsSeqArray = []
  longestSeq = ''
  longestLength = -1
  for i in [0..x.length]
    t = []
    s = []
    for j in [0..y.length]
       t.push(0)

railsstudent

class RomanNumerals

  literalMap = {
    'I' : 1,
    'V' : 5,
    'X' : 10,  
    'L' : 50,
    'C' : 100,
    'D' : 500,
    'M' : 1000

railsstudent

class UriBuilder
  
  constructor: (@url) ->
    @params = {}
    idx = @url.indexOf('?')
    if idx >= 0
      lstParams = @url.substring(idx + 1)
      @url = @url.substring(0, idx)

      paramPairs = lstParams.split('&')

railsstudent

function nbMonths(startPriceOld, startPriceNew, savingperMonth, percentLossByMonth) {
  //your code here
  if (startPriceOld >= startPriceNew) {
    return [0, Math.floor(startPriceOld - startPriceNew)];
  }
  
  let months = 0;
  let totalSaving = 0;
  let depreciatedPriceNew = startPriceNew;
  let depreciatedPriceOld = startPriceOld;