gistfile1.js

Function.prototype.default = function() {
    var that = this,
        defArgs = arguments,
        count = arguments.length;
    
    return function() {
        var args = Array.prototype.slice.call(arguments);
        if (count) {
            for (var i=0; i<count; ++i) {
                if(typeof args[i] === 'undefined') {
                    args[i] = defArgs[i];
                }
            }
        }
        
        that.apply(this, args);
    }
}




var test = function(a, b, c) {
    console.log(a, b, c);
}.default(1, 'huy', [2,3,4]);




test();
test('xcv', 11);
test({},[],1234567,'gello');