unsplash.com I like javascript, as always. But it was hurt, every time when I was required to program in OOP pattern. All those topics: Objects, Classes,Prototype, Inheritance etc., are the pain for developer, which caused by the personality of “loose comparison temper” and “auto type conversion OCD” of JS. This is an example from stackoverflow : First, Rabbit is a object, with public valuable and . jumps default value “yes” function Rabbit() { this.jumps = "yes";};var rabbit = new Rabbit();console.log(rabbit.jumps); // yesconsole.log(Rabbit.prototype.constructor); // outputs exactly the code of the function Rabbit(); Second, we want to change the code in Rabbit() so that the var with different Well, modifying default value of Object, and there is . , my gut tells me modifying the constructor function and problem will solved. it is not. jumps default value “no”. Object prototype.constructor( ) BUT Rabbit.prototype.constructor = function Rabbit() { this.jumps = "no";};console.log(Rabbit.prototype.constructor); // again outputs the code with new this.jumps = "no";var rabbit2 = new Rabbit();// create new object with new constructorconsole.log(rabbit2.jumps); // still What is happening is that Rabbit.prototype.constructor is just a pointer to the original constructor (function Rabit(){…}), so that users of the ‘class’ can detect the constructor from an instance. By Juan If you want to redefine a constructor, just do var oldProto = Rabbit.prototype;Rabbit = function() { this.jumps = "no";}; Rabbit.prototype = oldProto; You also like Cracking nuts series: [Expressjs] override res.send [Expressjs] put the IP to BlackList Like this story? It is helpful to others? It helps me know if you’d like to see write more about his topic and helps people see the story, . when tap the heart below Reference: _Why is it impossible to change constructor function from prototype?_ http://js-bits.blogspot.tw/2010/08/javascript-inheritance-done-right.html _Tuesday, August 17, 2010 Javascript Inheritance Done Right_ http://stackoverflow.com/questions/9267157/why-is-it-impossible-to-change-constructor-function-from-prototype
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