From the teachability perspective, I'm tired of explaining the closure hack to explain "private" properties. Even to some who are experienced webdevs, I have to explain that they can't access the "private" property through "this.". The language needs to evolve to the point where people can write "this[something]" to retrieve private state. Symbols work for that.
Below is a slight variation of the closure "hack" that allows using private properties through this. The idea is to use the public 'this' as prototype for the private 'this', using 'bind' to give instance methods access to the private 'this' Claus var MyClass = (function () { function MyClass(id) { this.id = id; var private_this = Object.create(this); // this and more private_this.secret = Math.random().toString(); this.guess = guess.bind(private_this); } function guess(guess) { var check = guess===this.secret ? "I'm not telling!" : "That guess is wrong!"; console.log("("+this.id+"'s secret is: "+this.secret+")"); console.log(this.id+' says: '+check); } return MyClass; })(); var myObj1 = new MyClass("instance1"); var myObj2 = new MyClass("instance2"); console.log(myObj1,myObj2); var guess = Math.random().toString(); console.log("guessing: "+guess); myObj1.guess(guess); myObj2.guess(guess); _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss