Populating another array from array - Javascript

copy-or-clone-javascript-array-object

var a = [ 'apple', 'orange', 'grape' ];
 b = a.slice(0);

In ES6 you can use Array.from:

var ar = ["apple","banana","canaple"];
var bar = Array.from(ar);
alert(bar[1]); // alerts 'banana'

Your code isn't working because you are not initializing bar:

var bar = [];

You also forgot to declare your i variable, which can be problematic, for example if the code is inside a function, i will end up being a global variable (always use var :).

But, you can avoid the loop, simply by using the slice method to create a copy of your first array:

var arr = ["apple","banana","canaple"];
var bar = arr.slice();

You have two problems:

First you need to initialize bar as an array:

var bar = [];

Then arr should be ar in here:

for(i=0;i<arr.length;i++){

Then you'll get alerted your banana :)