Copy an array code example

Example 1: javascript copy an array

let arr =["a","b","c"];
// ES6 way
const copy = [...arr];

// older method
const copy = Array.from(arr);

Example 2: copy array javascript

const sheeps = ['Apple', 'Banana', 'Juice'];

// Old way
const cloneSheeps = sheeps.slice();

// ES6 way
const cloneSheepsES6 = [...sheeps];

Example 3: how to make a copy of an array java

int a[] = {1, 8, 3}; 
  
// Copy elements of a[] to b[] 
int b[] = a.clone();

Example 4: java copy array

int[] a = {1,2,3,4,5};
int[] b = Arrays.copyOf(a, a.length);

Example 5: javascript copy array

var numbers = [1,2,3,4,5];
var newNumbers = Object.assign([], numbers);

Example 6: javascript copy array

// this is for array with complex object
var countries = [
  {name: 'USA', population: '300M'}, 
  {name: 'China', population: '1.6B'}
];

var newCountries = JSON.parse(JSON.stringify(countries));