Maybe Monad in Javascript

Maybe.class.js

"use strict"

/*

An implementation of the Maybe monad in ES6, representing 
 - Maybe as a singleton array
 - Nothing and null

Compiled and run with Traceur
traceur --out build.js --script maybe.js

*/

var $traceurRuntime = require('traceur-runtime');

class Maybe {
	constructor() {
		this.value = [];
	}

	nothing() {
		this.value = [];
		return this;
	}

	unit(x) {
		this.value = [x];
		return this;
	}

	bind(f) {
		switch (this.value.length) {
			case 0: return this;			// returns the monad with value = []
			case 1: return f(this.value[0]);
		}
	}

	get() {
		switch (this.value.length) {
			case 0: return null;
			case 1: return this.value[0];
		}
	}
}