Done

arrays.js

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+var chocolateBars = ["snickers", "hundred grand", "kitkat", "skittles"];
+var addedChocolateBar = "foo";
+
+function addElementToBeginningOfArray(chocolateBars, addedChocolateBar) {
+  var moreChocolateBars = [addedChocolateBar,...chocolateBars]
+  return moreChocolateBars;
+}
+
+function destructivelyAddElementToBeginningOfArray(chocolateBars, addedChocolateBar) {
+  chocolateBars.unshift(addedChocolateBar);
+  return chocolateBars;
+}
+
+function addElementToEndOfArray(chocolateBars, addedChocolateBar) {
+  var moreChocolateBars = [...chocolateBars,addedChocolateBar]
+  return moreChocolateBars;
+}
+
+function destructivelyAddElementToEndOfArray(chocolateBars, addedChocolateBar) {
+  chocolateBars.push(addedChocolateBar);
+  return chocolateBars;
+}
+
+function accessElementInArray(array, index) {
+  return array[index];
+}
+
+function destructivelyRemoveElementFromBeginningOfArray(chocolateBars) {
+  chocolateBars.shift();
+  return chocolateBars;
+}
+
+function removeElementFromBeginningOfArray (chocolateBars) {
+  return chocolateBars.slice(1);
+}
+
+function destructivelyRemoveElementFromEndOfArray(chocolateBars) {
+  chocolateBars.pop();
+  return chocolateBars;
+}
+
+function removeElementFromEndOfArray(chocolateBars) {
+  chocolateBars = chocolateBars.slice(0, chocolateBars.length - 1);
+  return chocolateBars;
+}