function Programmer(name, company, expertise) {

   if (!(this instanceof Programmer)) {

       return new Programmer(name, company, expertise);

   }

   this.name = name;

   this.company = company;

   this.expertise = expertise;

   this.writeCode = function () {

       console.log("Writing some public static thing..")

   }

}

柯里化

var curry = function (fn) {

   var limit = fn.length;

   return function judgeCurry(...args) {

       return function (...args) {

           if (args.length >= limit) {

               return fn.apply(null, args);

           } else {

               return function (...args2) {

                   return judgeCurry.apply(null, args.concat(args2))

               }

           }

       }

   }

};

var currySingle = fn => judgeCurry = (...args) => args.length >= fn.length ? fn.apply(null, args) : (...args2) => judgeCurry.apply(null, args.concat(args2));

对象拷贝与赋值

var obj = {

   name: 'xiaoming',

   age: 23

};

var newObj = obj;

newObj.name = 'xiaohua';

console.log(obj.name);//xiaohua

console.log(newObj.name);//xiaohua

我们将obj对象赋值给了newObj对象，从而改变newObj的name属性，但是obj对象的name属性也被篡改，这是因为实际上newObj对象获得的只是一个内存地址，而不是真正的拷贝，所以obj对象被篡改。

var obj = {

   name: 'xiaoming',

   age: 23

};