donabrams · April 21, 2017 15:06 · donabrams · Apr 21, 2017
diff --git a/example.js b/example.js
 var good = {a: {b: {c: 1}}}

 console.log(new Maybe(good).bind(t=>t.a).bind(t=>t.b).bind(t=>t.c).getOrElse(2))

 var bad = {a: 3}

 console.log(new Maybe(bad).bind(t=>t.a).bind(t=>t.b).bind(t=>t.c).getOrElse(2))
diff --git a/maybe.js b/maybe.js
 const None = {}
 const isNone = (t) => t === None || t === null || typeof t === 'undefined'

 class Maybe {
  constructor(val) {
    this.val = isNone(val) ? None : val
  }
  getOrElse(defaultVal) {
    return this.val === None ? defaultVal : this.val
  }
  bind(f) {
    const toWrap = this.val === None ? None : f(this.val)// Hmm, maybe this should just be f(this.val)   ¯\_(ツ)_/¯
    return toWrap instanceof Maybe ? toWrap : new Maybe(toWrap)
  }
 }
	var good = {a: {b: {c: 1}}}

	console.log(new Maybe(good).bind(t=>t.a).bind(t=>t.b).bind(t=>t.c).getOrElse(2))

	var bad = {a: 3}

	console.log(new Maybe(bad).bind(t=>t.a).bind(t=>t.b).bind(t=>t.c).getOrElse(2))
	const None = {}
	const isNone = (t) => t === None \|\| t === null \|\| typeof t === 'undefined'

	class Maybe {
	constructor(val) {
	this.val = isNone(val) ? None : val
	}
	getOrElse(defaultVal) {
	return this.val === None ? defaultVal : this.val
	}
	bind(f) {
	const toWrap = this.val === None ? None : f(this.val)// Hmm, maybe this should just be f(this.val) ¯\_(ツ)_/¯
	return toWrap instanceof Maybe ? toWrap : new Maybe(toWrap)
	}
	}