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- Make list drill
- function makeList(item1, item2, item3) {
- const arr = [item1, item2, item3];
- return arr;
- }
- Add to list drill
- function addToList(list, item) {
- list.push(item);
- return list;
- }
- Access first and third items
- function accessFirstItem(array) {
- return (array[0]);
- }
- function accessThirdItem(array) {
- return (array[2]);
- }
- Array length and access
- function findLength(array) {
- return (array.length);
- }
- function accessLastItem(array) {
- return array.pop();
- }
- Array copying I
- function firstFourItems(array) {
- return array.slice(0, 4);
- }
- function lastThreeItems(array) {
- return array.slice(-3);
- }
- Array copying II
- function minusLastItem(array) {
- const lengthMinusOne = array.length - 1
- return array.slice(0, lengthMinusOne)
- }
- function copyFirstHalf(array) {
- const halfArray = (array.length / 2)
- return array.slice(0, halfArray)
- }
- Squares with map
- function squares(array) {
- function squared(num) {
- return (num ** 2);
- }
- return array.map(squared);
- }
- Sort greatest to least
- function greatestToLeast(array) {
- function sortGreatest(a, b){
- return b-a;
- } return array.sort(sortGreatest);
- }
- Filter
- function shortWords(array) {
- function lessThanFive(num) {
- return num.length < 5;
- } return array.filter(lessThanFive)
- }
- Find
- function divisibleBy5(array) {
- function divisible(num) {
- return num % 5 === 0;
- } return array.find(divisible);
- }
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