Question

I have the following variables:

    var opday = [],
        opcategory = [],
        opbarrio = [];

Then I have elsewhere:

        var myparent = $me.parent().attr('data-filter-group');

Supposing myparent returns “category”, how can I create an object from that string that references the variable opcategory??

For example:

var myarray = "op" + myparent;

So that I might use that object like so:

alert(myarray[2]);

Thanks!

Answer 1

You can address variables declared in global scope as:

var myCustomVar = "my value"
, nameOfVar = "myCustomVar"
alert(this[nameOfVar])
// you get "my value"

However, this does not work if you stick it inside of the function:

var answer = (
    function(){
        var myvar = "the value"
        return this["myvar"]
    }
).call({})
// answer will be 'undefined'

Explicitly tying the scope vars to this works though:

var answer = (
    function(){
        this.myvar = "the value"
        return this["myvar"]
    }
).call({})
// 'answer' will be "the value"