Haskell - interpreting a number

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Published on 2010-05-31T02:42:10Z Indexed on 2010/05/31 2:52 UTC
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I have a number 9877342931235. Using Haskell, I need to show it as:

987-734293-123-5

i've tried interspersing the list but of course that puts '-' between every digit. How would I do it to yield the actual result?

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Haskell - interpreting a number

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Haskell's cabal dependency problem with happy

Understanding Haskell's fibonacci

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