arrays.js

var chocolateBars = ['snickers', 'hundred grand', 'kitkat', 'skittles']

function addElementToBeginningOfArray(array, element) {
  var newArray = [element, ...array]
  return newArray
}
function destructivelyAddElementToBeginningOfArray(array, element) {
  array.unshift(element)
  return array
}



function addElementToEndOfArray(array, element) {
  var newArray = [...array, element]
  return newArray
}

function destructivelyAddElementToEndOfArray(array, element) {
  array.push(element)
  return array
}

function accessElementInArray(array, index) {
  return array[index]
}

function destructivelyRemoveElementFromBeginningOfArray(array) {
  array.shift()
  return array
}

function removeElementFromBeginningOfArray(array) {
  var newArray = array.slice(1)
  return newArray
}

function destructivelyRemoveElementFromEndOfArray(array) {
  array.pop()
  return array
}

function removeElementFromEndOfArray(array) {
  newArray = array.slice(0, array.length - 1)
  return newArray
} 

console.log(chocolateBars)
console.log(chocolateBars.splice(1, 2, 'word1', 'word2'))
console.log(chocolateBars)