re: Notes on ECMAScript 6 (ES6) VIEW POST


Great notes!
If I may add: regarding to classes you might want to try something like this if you want to accept an options like constructor

class SomeClass {
  constructor(options) {
    Object.assign(this, options);
    // if you want required properties you may want to if check here
    // and throw if required props are not present

  toString() {
    return Object.entries(this)
      .map(([key, value]) => `[${key}: ${value}]`)
      .reduce((last, current) => `${last ? `${last}, ` :  ''}${current}`,'')

const some = new SomeClass({propA: 'this is a', propB: 'this is b'});
//"[propA: this is a], [propB: this is b]"

of course if you are using typescript you can extend that to use an interface and ensure you only accept what is required.


What are your thoughts on iterator as a protocol and not an interface?


it is pretty useful, I think it has become better to work with collections, if you have teamates with python background, they can easily recognize [...someIterable] also it lets you do some stuff like const keys = [...Object.keys(myObj)] without for in or for each
also for people that isn't too much into functional methods like map, reduce, ans such, for of is quite a savior.

on the protocol vs interface, I think protocol is better suited in jsland where interfaces only exist on agreements (which some times not everyone agrees the same thing), not enforced in code.

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