Monad join function

Asked 2010-08-01T13:31:50.187

While monads are represented in Haskell using the bind and return functions, they can also have another representation using the join function, such as discussed here. I know the type of this function is M(M(X))->M(X), but what does this actually do?

haskell monads

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From the same page we recover this information join x = x >>= id, with knowledge of how the bind and id functions work you should be able to figure out what join does.

answered 2010-08-01T13:46:48.923

Monad join function

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