how to get an immutable copy of array in js code example
Example 1: javascript copy array
var numbers = [1,2,3,4,5];
var newNumbers = Object.assign([], numbers);
Example 2: javascript copy array
var fruit = ["apple", "banana", "fig"];
console.log(fruit);
var fruit2 = fruit.slice();
console.log(fruit2);
var fruit3 = fruit.slice(0,2);
console.log(fruit3);
Example 3: javascript copy array
var countries = [
{name: 'USA', population: '300M'},
{name: 'China', population: '1.6B'}
];
var newCountries = JSON.parse(JSON.stringify(countries));