nickihastings

function permAlone(str) {
  //check if the string provided is only one character
  if(str.length === 1){
    return 1;
  }
  //function to create the permutations
  //for each value in the string, add the permutations of the rest
   function getPermutations(str){
    var output = [];

nickihastings

function updateInventory(arr1, arr2) {
    // All inventory must be accounted for or you're fired!
    //check the items in arr2 against those in arr1
    //if the item is found update the value and set found to true.
    //if the item is not found add it to arr1 
    for(var i = 0; i < arr2.length; i++){ //loop over array 2
      var found = false;
      for(var j = 0; j<arr1.length; j++){ //loop over array 1
        if(arr2[i][1] === arr1[j][1]){

nickihastings

function checkCashRegister(price, cash, cid) {
  //change all decimals to whole numbers for ease
  //First work out how much change is needed
  var change = (cash * 100) - (price * 100);
  
  //Next work out how much cash there is in the cash register using
  //reduce to add all the values and turn to whole numbers
  var totalCash = cid.reduce(function(accum, current){
    accum = accum + (current[1]*100);

nickihastings

function sym(args) {
  //Put the arguments into an array
  var arrArgs = Array.prototype.slice.call(arguments);
  
  //Function to compare two arrays by reducing each one in
  //comparison with the other. Check if the item in first array
  //is also in the second array, if it isn't push it to the accumulator.
  //then repeat the other way around.
  function compareArrays(arr1, arr2){

nickihastings

// Setup
var collection = {
    "2548": {
      "album": "Slippery When Wet",
      "artist": "Bon Jovi",
      "tracks": [ 
        "Let It Rock", 
        "You Give Love a Bad Name" 
      ]

nickihastings

function telephoneCheck(str) {
  // Good luck!
  
  var regex = /(^1(?=(\s\d{3}\s?-?\d{3}\s?-?\d{4}$)|(\s?\(\d{3}\)\s?-?\d{3}\s?-?\d{4}$)))|(^\((?=\d{3}\)\s?-?\d{3}\s?-?\d{4}$))|(^\d{3}(?=\s?-?\d{3}\s?\-?\d{4}$))/;
     
  return regex.test(str);

}

nickihastings

function addTogether() {
  //create a function that test whether arguments are numbers
  //if not a number return undefined, if it is return the number
  function checkArgs(val){
    if(typeof val !== 'number'){
      return undefined;
    }
    return val;
  }

nickihastings

function truthCheck(collection, pre) {
  // Is everyone being true?
  //set a variable to count the truthies
  var truthy = 0;
  //loop over the array and test for true
  //if it's true add one to truth
  for(var i = 0; i<collection.length; i++){
    if(collection[i][pre]){
      truthy ++;
    }

nickihastings

function binaryAgent(str) {
  var arr = str.split(' ');
  //var words = [];
  for(var i =0; i<arr.length; i++){
    arr[i] = parseInt(arr[i], 2);
    arr[i] = String.fromCharCode(arr[i]);
    //can also write the above as:
    //words.push(String.fromCharCode(parseInt(arr[i], 2))); 
    //parses first then converts to letter then pushes to array.
  }

nickihastings

function steamrollArray(arr) {
  // I'm a steamroller, baby
  var result = []; //store the resulting flat array
  //function to recursively flatten arrays inside of arrays.
  function flatten(arr){
    //for every item in the array check if it is an array itself
    for(var i = 0; i < arr.length; i++){
      if(Array.isArray(arr[i]) ){
        //if it is an array call the flatten function and concatinate the results