Javascript: Call function, pass array of arguments, similar to setTimout()'s functionality [duplicate]

Question

I want to do what setTimout does, manually, with no timeout.

setTimeout(function,0,args);

Just call a function and pass it an array of arguments, without knowing or caring how many arguments were there.

Basically I want to proxy the function call through another function.

I'm bad with terminology, sorry.

Answer 1

function f(a, b, c) { return a + b + c; }
alert(f.apply(f, ['hello', ' ', 'world']));

Answer 2

In ES6:

function myFunc(a, b, c){
    console.log(a, b, c);
}

var args = [1, 2, 3];
myFunc(...args);