[Haskell-beginners] Re: Is this overkill?
chaddai.fouche at gmail.com
Sun Apr 5 11:57:13 EDT 2009
On Sat, Apr 4, 2009 at 5:20 AM, Zachary Turner <divisortheory at gmail.com> wrote:
>> With Conal's semantic editor combinators
>> it would be written as
>> trueIndices =
>> (result . result) (map fst . filter snd . zip [0..]) (zipWith (&&))
> That was a pretty interesting blog post, and easily understandable which is
> always nice. Thanks for the link. I also had never even used the zipWith
> function, so thanks for pointing out that equivalence.
I'm not sure you really want to write this pointfree... Generally I
tend to avoid it when there's two arguments of identical standing.
Also the (map fst . filter snd...) is a Data.List function
trueIndices xs ys = findindices id $ zipWith (&&) xs ys
I love the pointfree style and it might be a good exercise to try and
transcribe any function to pointfree, but sometimes pointful is just
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