Hi Jan-Willem Maessen - Sun Labs East wrote:
Tomasz Zielonka wrote:
I found it useful recently, when I needed zip functions for Trees - this way I didn't have to define functions for 3 trees, 4 trees, and so on.
Note also that:
repeat f `zwApply` xs = map f xs
When cooking up my own collection-y things (including splittable supplies, for example), I generally provide fmap and an equivalent of zwApply (a generic repeat is not quite so simple or useful). It's a nice little idiom, and a recommend it highly. ^^^^^
Funny you should choose that word: http://www.mail-archive.com/haskell@haskell.org/msg15073.html saves me banging the same old drum. Cheers Conor PS Many apologies for not having written this up yet! -- http://www.cs.nott.ac.uk/~ctm [I've moved again...]