drills-2.4.2.js

function makeList(item1, item2, item3) {
  return [item1, item2, item3];
}

function addToList(list, item) {
  list.push(item);
  return list;
}

function accessFirstItem(array) {
  return array[0];
}

function accessThirdItem(array) {
  return array[2];
}

function findLength(array) {
  return array.length;
}

function accessLastItem(array) {
  return array[array.length-1];
}

function firstFourItems(array) {
  return array.slice(0,4);
}

function lastThreeItems(array) {
  return array.slice(array.length-3,array.length)
}

function minusLastItem(array) {
  return array.slice(0,array.length-1);
}

function copyFirstHalf(array) {  
  return array.slice(0,Math.floor(array.length/2))
}

function squares(array) {
  return array.map(function(num) {
      return num ** 2;
    });
}

function greatestToLeast(array) {
  return array.sort(function(a, b){return a-b}).reverse()
}

function shortWords(array) {
  return array.filter(function(word){return word.length < 5})
}

function divisibleBy5(array) {
  return array.find(function(num){return !(num % 5)})
}