Javascript array with objects

Question

I want to create/instantiate an array objectArray with several objects, whereby the objects shall contain x and y (empty at the beginning).

The length (amount of objects) of objectArray needs to be the same as the length of i.e. arrayLong. How I have to implement that?

Finally, it should look like that (etc. corresponding to the length of arrayLong):

var objectArray = [ { x: 0, y: 0 }, { x: 0, y: 0 }, { x: 0, y: 0 } etc. ];

Create an empty array and add initialized objects in a loop. — Pointy
– Pointy, Commented Jul 2, 2014 at 13:02

Cerbrus · Accepted Answer · 2014-07-02 13:33:02Z

3

Simple:

var objectArray = [];               // Declare the array variable
for(var i = 0; i < arrayLong; i++){ // Do something `arrayLong` times
    objectArray.push({x: 0, y:0});  // Add a object to the array.
}

This assumes arrayLong is a numeric value, of course.

Another way you could do it, is this:

var objectArray = Array.apply(null, Array(arrayLong))
                       .map(function(){return {x: 0, y:0}});

edited Jul 2, 2014 at 13:33

answered Jul 2, 2014 at 13:04

Cerbrus

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1 Comment

Cerbrus Over a year ago

Whoops, that should've been arrayLong, not 5 :P Thanks, though!

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