Updated Dale Schumacher's "Actor Model in a Tweet" - and an async/await version

actor-model-in-a-tweet.js

// 28 December 2020
// https://twitter.com/dfkaye/status/1343784103674400769
// Updated @dalnefre's actor model in a tweet:

var Actor = (a, e) => function c(b) {
  a = d => setTimeout(() => b.call(e, d))
  e = { self: a, behavior: b, sponsor: c }
  return a
}

Actor()(s => console.log(s))("test")
// "test"

Actor()(s => console.log(this, s))("arrow scope")
// Window, "arrow scope"

Actor()(function(s) { console.log(this, s) })("function scope")
// Object{ self, behavior, sponsor }, "function scope"

/*
References:

https://twitter.com/dalnefre/status/407009429280669696

https://twitter.com/dalnefre/status/407887997003370496

http://dalnefre.com/wp/2014/03/actors-in-javascript/
 */

async-actor-in-a-tweet.js

// 20 December 2021

// replace "setTimeout" with async/await on behavior b function

var A = (a, e) => function c(b) {
  a = async d => await b.call(e, d)
  e = { self: a, behavior: b, sponsor: c }
  return a
}

A()(s => { console.log(s); return s })("example")
// logs "example"
// returns Promise { <state>: "fulfilled", <value>: "example" }

// 21 December 2021 - using fn.bind(console) logs but does not return the value.

A()(console.log.bind(console))("bound call")
// logs "bound call"
// returns Promise { <state>: "fulfilled", <value>: undefined }

// 21 December 2021 -  using this? the behavior must be a function, not an arrow.

A()(s => { console.log(this); return s })("arrow")
// logs Window (global)
// returns Promise { <state>: "fulfilled", <value>: "arrow" }

A()(function(s) { console.log(this); return s })("function")
// logs Object { spec: asyn a(d), behavior: (s), sponsor: c(b, a, e) }
// returns Promise { <state>: "fulfilled", <value>: "function" }