Function currying in JavaScript

curry.js

var partial = function (f, partialArgs) {
    return function () {
        var args = [];
        Array.prototype.push.apply(args, partialArgs);
        Array.prototype.push.apply(args, arguments);
        return f.apply(this, args);
    };
};

var curry = function (f) {
    var arity = f.length;
    return function curried() {
        if (arguments.length >= arity) {
            return f.apply(this, arguments);
        }
        return partial(curried, arguments);
    };
};