Arrays

Array Definition

module.exports.newArray = function(a,b,c,d) {   
  return [a,b,c,d];
};

module.exports.firstAndLast = function(a) {
  var lastIndex = a.length - 1;
  return [a[0],a[lastIndex]]; 
};

Array functions

TBD

Grocery List

module.exports.addItem = function(item, list) {
  if (list.indexOf(item) == -1) {
    list.push(item);
  }
  return list;
};

module.exports.reverseSortedList = function(list) {
  return list.sort().reverse();
};