[Haskell-cafe] State Monad

Sam G. sam.g at myrealbox.com
Wed Mar 2 20:03:54 EST 2005

I need a Monad to represent an internal stack. I mean I've got a lot of functions which operates on lists and I would not like to pass the list as an argument everytime. 

Could you help me writing this monad? To start, I just need a + function which will return the sum of the 2 toppest elements of the stack.

Thanks in advance,

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