Referencing an object in an array of objects in javascript

Question

var Bar = function(){

}

Bar.prototype.drawBar = function(obj){ 

}

var bars = [];// Creating array 
for (i = 0;i < ar.length ;i++){
    bars[i] = [new Bar(ar[i],i)]; // Creating array of objects
    bars[i].drawBar(i);// I am looking for something like this, Currently it doesn't work
}

I have something like this, How do I draw a bar, giving a reference/index, It should draw with the measurements

You probably want bars[i] = new Bar(ar[i],i);. Or do you really want an array of arrays? — Felix Kling
– Felix Kling, Commented Apr 10, 2012 at 10:57
So you are asking how to draw a graph with JavaScript, correct? — Jan Hančič
– Jan Hančič, Commented Apr 10, 2012 at 11:04

Guffa · Accepted Answer · 2012-04-10 11:06:02Z

1

You are trying to use bars[i] as if it was a Bar object, but it's an array of objects.

Use this to access the first object in the array:

bars[i][0].drawBar(i);

If you don't have any use for an array of arrays, just store the objects in the array directly:

bars[i] = new Bar(ar[i],i);

Then your original code to access the object works.

answered Apr 10, 2012 at 11:06

Guffa

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