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What does this javascript syntax do -> obj[‘name’](var1,var2)

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Aug 02.2012

What does this line of code in javascript execute?

[CODE]return obj[‘name’](var1,var2);[/CODE]

I understand

[CODE]obj[‘name’] = “”;[/CODE]

is an associative array with a value. but what happens when there are parenthesis and passing arguments next to it? and how would i debug it in the web developer console? Thanks for any help.

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JavaScript

2 Comments(s) ↴

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@svidgenAug 02.2012 — A function can behave like any other object in javascript. It can be assigned to a variable, popped into an array, or stuffed in an object:

[code=php]obj['add'] = function(x, y) { return x + y; }
var sum = obj.add(1, 2);
var other_sum = obj['add'](1, 2);[/code]

At the console in Chrome (or Safari):

[CODE]> var obj = {};
undefined
> obj['add'] = function(x, y) { return x + y; }
function (x, y) { return x + y; }
> obj.add;
function (x, y) { return x + y; }
> obj['add'];
function (x, y) { return x + y; }
> obj.add(1, 2);
3
> obj['add'](3, 4);
7[/CODE]
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@anthoangauthorAug 02.2012 — Thanks svidgen

having a hard time trying to find in the code where this function is being executed to get the return value.
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