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

[anthoang]

What does this line of code in javascript execute?

return obj['name'](var1,var2);

I understand

obj['name'] = "";

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.

[svidgen]

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:

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

At the console in Chrome (or Safari):

> 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

[anthoang]

Thanks svidgen

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