Get the last item in an array

Question

Here is my JavaScript code so far:

var linkElement = document.getElementById(\"BackButton\");
var loc_array = document.location.href.split(\'/\');
var newT =         


        

Answer 1

Multiple ways to find last value of an array in javascript

• Without affecting original array

var arr = [1,2,3,4,5];

console.log(arr.slice(-1)[0])
console.log(arr[arr.length-1])
const [last] = [...arr].reverse();
console.log(last)

let copyArr = [...arr];
console.log(copyArr.reverse()[0]);

• Modifies original array

var arr = [1,2,3,4,5];

console.log(arr.pop())
arr.push(5)
console.log(...arr.splice(-1));

• By creating own helper method

let arr = [1, 2, 3, 4, 5];

Object.defineProperty(arr, 'last', 
{ get: function(){
  return this[this.length-1];
 }
})

console.log(arr.last);