Add hmap
#31
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Add hmap
#31
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I think However, the real question is whether it's worth adding this to a core library. |
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Or put differently, does it pass the Fairbairn Threshold? |
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Useful for changing the type of the underlying collection.
The 'h' in "hmap" is for higher-order.
I could also easily be convinced to use the name hoist: http://hackage.haskell.org/package/mmorph-1.1.2/docs/Control-Monad-Morph.html#v:hoist.