liweiz

// http://stackoverflow.com/questions/27595749/douglas-crockford-on-class-free-oop-in-javascript
// https://www.youtube.com/watch?v=PSGEjv3Tqo0#t=1395
// 
// Per Douglas Crockford (but requries ES6 support)
// function constructor(spec) {
//   let {member} = spec,
//     {other}  = other_constructor(spec),
//     method   = function () {
//       // accesses member, other, method, spec
//     };

liweiz

Douglas Crockford showed a slide showing how he creates JavaScript objects in 2014.

He no longer uses Object.create(), avoids 'this' and doesn't even care about memory reduction by using prototypes.

https://www.youtube.com/watch?v=bo36MrBfTk4 (skip ahead to 35 mins for relevant section)

Here is the pattern described on the slide:

function constructor(spec) {

liweiz

function constructor(spec) {
  let { member } = spec,
      { other } = other_constructor(spec),
      method = function() {
          // member, other, methid, spec
      };

  return Object.freeze({
      method,
      other

liweiz

import Foundation

extension JSONSerialization {
    enum CastingError : Swift.Error {
        case incompatibleType
    }

    static func jsonObject<T>(with data: Data, options: JSONSerialization.ReadingOptions) throws -> T {
        let anyResult: Any = try jsonObject(with: data, options: options)
        if let result = anyResult as? T {