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 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 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

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

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

/* UPDATED NOVEMBER 2021 to work with the latest FreeCodeCamp tests
Design a cash register drawer function checkCashRegister() that accepts purchase price as the first argument (price), 
payment as the second argument (cash), and cash-in-drawer (cid) as the third argument.
cid is a 2D array listing available currency.
The checkCashRegister() function should always return an object with a status key and a change key.
Return {status: "INSUFFICIENT_FUNDS", change: []} if cash-in-drawer is less than the change due, or if you cannot return 
the exact change.
Return {status: "CLOSED", change: [...]} with cash-in-drawer as the value for the key change if it is equal to the change due.
Otherwise, return {status: "OPEN", change: [...]}, with the change due in coins and bills, sorted in highest to lowest order,
as the value of the change key.

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 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

var Person = function(firstAndLast) {
  var arr = firstAndLast.split(' ');
  var firstName = arr[0];
  var lastName = arr[1];
  
    // Complete the method below and implement the others similarly
    this.getFullName = function() {
      return firstName + ' ' + lastName;
    };
    this.getFirstName = function() {

nickihastings

function orbitalPeriod(arr) {
  var GM = 398600.4418;
  var earthRadius = 6367.4447;
  //create a function to calculate orbital period
  function calcPeriod(avgAlt){
    var orbitalRadius = earthRadius + avgAlt;
    //calculation is 2 multiplied by pi multiplied by the square root of the
    //orbital radius to the power of 3 divided by the GM
    var period = Math.round(2*Math.PI*(Math.sqrt(Math.pow(orbitalRadius,3)/GM)));
    return period;