dollarSignCanDoAggregate.js

gistfile1.txt

(function(global) {

        global.$ = function(initNum) {

            var aggregate = initNum;

            return {

                add: function(plusNum) {
                    aggregate += plusNum;

                    return this;
                },
                result: function() {
                    return aggregate;
                }

            };
        }

    }

)(window);


// for test
console.log($(1).add(2).add(3).add(4).result());

console.log($(2).add(5).result());

console.log($(7).add(2).add(100).add(9).result());