curryAndCall as a prototype method for Functions

curryandcall.js

Function.prototype.curryAndCall = function () {
    var args = Array.prototype.slice.call(arguments);
    
    var curry = function (originalFunc, collectedArgs) {
        return function () {
            var args = Array.prototype.slice.call(arguments);
            if (args.length + collectedArgs.length >= originalFunc.length) {
                return originalFunc.apply(originalFunc, collectedArgs.concat(args));
            } else {
                return curry(originalFunc, collectedArgs.concat(args));
            }
        }
    };

    if (args.length >= this.length) {
        return this.apply(this, args);
    } else {
        return curry(this, args);
    }
};

// Test subject: function with 4 arguments.
var logFour = function (a, b, c, d) {
    console.log('--------->', a, b, c, d);
};

// Keep pre-populating arguments for logFour() until we have all four,
// then call the original function with all collected arguments.
logFour.curryAndCall(1)(2,3)(4);

Inspired by https://gist.github.com/alexdiliberto/2a516eeea9a4d9eb52e2 but I tried to avoid using additional helper functions.