A Gentle Intro to Monads … Maybe?

Re:A Gentle Intro to Monads … Maybe? by dllthomas on Saturday January 18, 2014 @12:01AM (#7080145)

Fancy chained method calls are equivalent to do notation without any binds, which only needs Applicative. Monad is sufficient but not necessary.

That said, this does appear to be a monad - they implemented bind correctly.

Haskell:

    instance  Monad Maybe  where
        Nothing  >>= _      = Nothing
        (Just x) >>= k      = k x

From the article:

        var Nothing = {
            bind: function(fn) { 
                return this; 
            }
        };
    
        var Something = function(value) { 
            return {
                bind: function(fn) { 
                    return Maybe(fn.call(this, value));
                }
            };
        };

It doesn't really use it right, for the most part, though (... I think; I only skimmed).

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Re:A Gentle Intro to Monads … Maybe? by jerf on Saturday January 18, 2014 @08:19PM (#7083009)

I think bind is essentially correct too, but the failure to use it properly tends to suggest a level of understanding too small to be writing Yet Another Monad Tutorial. I've seen real JS monads, and I believe they are irretrievably ugly to use, with the need for nested functions.

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