Clone_An_Array.js

/*
Clone an Array
 4 ways to create a clone
  1. Spread Operator
  2. Filter
  3. Map
  4. Array.from
*/


//Using the spread operator we can make a clone of an array
var arr = [10, 20, 30, 40, 50, 60];

var arr1 = [...arr];

arr1;
(6) [10, 20, 30, 40, 50, 60]
arr1 === arr
false


//Without using the spread operator we can also make a clone of an array (using filter method)

var g = arr.filter(w=>true); // we are creating a sub array

g;
(6) [10, 20, 30, 40, 50, 60]
g === arr1;
false


//  we can also make a clone of an array (using map method)
// map creates the array of same length
var g = arr.map(w=>w); // we are creating a sub array
g;
(6) [10, 20, 30, 40, 50, 60]
g === arr1;
false


var arr4 = Array.from(arr);          // creating a clone
undefined
arr4;
(6) [10, 20, 30, 40, 50, 60]
arr4 === arr;                // reference to different location
false