JavaScript Arrays

[dustwhirl]

I have the following:

var x = [];
x.push({layerId: 2, layerName: 'Counties'});
x.push({layerId: 3, layerName: 'States'});

Now when setting up parameters, one of the properties is layerIds (which is an array). How can I set 'x' to layerIds?

I tried this, but it doesn't work:

layerIds = x.layerId;

[xelawho]

I'm probably not getting it, but is

x[0].layerId

what you're looking for? (where 0 is the position in the array of the object whose property you want to access)

[dustwhirl]

No. I want all of the 'layerId' values in the 'x' array.

If it was this:

var x = [];
x.push(2);
x.push(3);

and

layerIds = x;

then everything would be fine. But I have 'x' set up as the following:

var x = [];
x.push({layerId: 2, layerName: 'Counties'});
x.push({layerId: 3, layerName: 'States'});

and I want the layerIds array to be set to the layerId property of the 'x' array.

[xelawho]

well I guess you would have to push those values onto the layerIds array, preferably in a loop.

to cut down on all that push repetition, you can construct the original array like this:

var x = [{layerId: 2, layerName: 'Counties'},
{layerId: 3, layerName: 'States'}];

and once you have done with that, like I say, loop through the x array, pushing the layerId values onto your layerIds array

although if you are using jQuery I think (but I don't know because I don't use it) that there are some built-in methods for cloning arrays and objects - maybe you can mix n match

[Kor]

I have the following:

var x = [];
x.push({layerId: 2, layerName: 'Counties'});
x.push({layerId: 3, layerName: 'States'});

Now when setting up parameters, one of the properties is layerIds (which is an array). How can I set 'x' to layerIds?

I tried this, but it doesn't work:

layerIds = x.layerId;

Try:

var layerIds=[];
for(var i=0;i<x.length;i++){
layerIds[layerIds.length]=x[i].layerId;
}