Call function with array of parameters

Question

Is there a way of doing this without altering the function?

function foo(bar1, bar2, bar3)
{
    return bar1 + bar2 + bar3;
}
var array = [1, 2, 3];
console.log(foo(array)); //6

foo(array[0], array[1], array[2]);?

Jared Farrish
– Jared Farrish

2011-11-24 09:04:50 +00:00
Commented Nov 24, 2011 at 9:04 — Jared Farrish
– Jared Farrish, Commented Nov 24, 2011 at 9:04

Paul · Accepted Answer · 2012-01-06 18:13:47Z

11

console.log(foo.apply(null, array));

edited Jan 6, 2012 at 18:13

answered Nov 24, 2011 at 9:06

Paul

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4 Comments

pimvdb Over a year ago

I don't think it makes much sense to set the this value to the function itself. Although it doesn't make any difference, I'd say setting it to e.g. null is more semantical.

Krzysztof Over a year ago

@pimvdb In function this usually points to window (in browser obviously), so I guess calling foo.apply(window, array) should be the natural choice.

Paul Over a year ago

@Lolo That makes sense :) I changed it again.

pimvdb Over a year ago

@Lolo: If you pass null as the this value then it will be set to the window automatically. But since the this value doesn't matter null would be more meaningful - but after all it doesn't matter at all.

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