apply arguments to function

Question

I would like to apply arguments represented as a hash to a function.

For example, I would like to call this function:

myFunc = function(a,b,c) { return b }

In a way similiar to this:

myFunc({a:1, b:2, c:3})

Is there a way to do this in javascript?

why use 3 parameters instead of one object parameter, does it it make sense ? — kirugan, Jan 23 '13 at 22:52
Yes, that is what I am doing right now. But i was hoping there is a better way. — Paul Nikonowicz, Jan 23 '13 at 22:53
currying normally works on tuples, not hashes. In hashes, the elements are unordered. — Mel Nicholson, Jan 23 '13 at 22:53
you can use arguments variable inside function and iterate over it, of course it is not so clear as your propose, but it works :) — kirugan, Jan 23 '13 at 22:54
Have you tried something like this http://www.javascriptkit.com/javatutors/namedfunction.shtml — chris, Jan 23 '13 at 22:56

score 1 · Answer 1 · answered Jan 23 '13 at 22:55

It's not possible to associate positional arguments in a function with key-value pairs in an object in general.

It is possible to configure a function to take arguments both ways:

myFunc = function (objOrA, b, c) {
    var a = objOrA;
    if (objOrA.a || objOrA.b || objOrA.c) {
        a = objOrA.a;
        b || (b = objOrA.b);
        c || (c = objOrA.c);
    }
    return b;
};

If you have control over the function definition, however, the simplest solution is simply to require an object as the sole parameter no matter what.

myFunc = function (options) {
    return options.b;
}

apply arguments to function

1 Answers1