Monad in Javascript

monad.js

/*
    From Doug Crockford's talk 'Monads and Gonads'
 */


/*
Doug calls this a Macroid - a JavaScript version of a macro.
Its purpose is to create the monad unit function for a specific monad type
 */
function MONAD (){
    return function unit (value) {
        var monad = Object.create(null);
        monad.bind = function (func) {
            return func(value);
        };
        return monad;
    };
}


// create an identity monad

var identity = MONAD();
var monad = identity('Hello World');
monad.bind(alert);

See promise implementation at https://github.com/douglascrockford/monad

and the lecture http://www.youtube.com/watch?v=dkZFtimgAcM

Further reading from the talk:

• http://channel9.msdn.com/Shows/Going+Deep/Hewitt-Meijer-and-Szyperski-The-Actor-Model-everything-you-wanted-to-know-but-were-afraid-to-ask
• http://www.youtube.com/watch?v=w9hHHvhZ_HY
• http://www.youtube.com/watch?v=oBqeDYETXME