Mastering Time-to-Market with Haskell

Re:Mastering Time-to-Market with Haskell by jstimpfle on Tuesday November 22, 2016 @11:09AM (#13015013)

Sure, I can use a Maybe variant, but the consequence would be that I wrap the whole program in a layer of maybes for cases that I "know" shouldn't happen but happened -- because I do make mistakes.

Or in other words, an "AssertionMonad". No thanks, I'm perfectly fine with assertion errors (i.e. "Index out of bounds"). I just need help with finding my own errors. Stacktraces are a good thing.

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Re:Mastering Time-to-Market with Haskell by pka on Tuesday November 22, 2016 @11:34AM (#13015224)

I agree, stack traces are a good thing.

For the time being, make a helper function:

ixWithString :: String -> Int -> Array a -> a

check the bounds inside and error out with a custom message when the index is outside the array bounds.

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