add initial groupby #143
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add initial groupby #143
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Bodigrim
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Jul 12, 2020
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Bodigrim
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Please do not omit type signatures. They make code easier to read.
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| {-# INLINE groupBy #-} | ||
| groupBy k xs = | ||
| switchL [] |
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What's the point? Why not pattern-match immediately?
groupBy k [] = []
groupBy k (h : t) = ...| xs | ||
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| -- | 'findIndexOrEnd' is a variant of findIndex, that returns the length | ||
| -- of the string if no element is found, rather than Nothing. |
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Is it faster than fromMaybe len (findIndex p)?
I think it is better to pattern-match on result of findIndex in groupBy: if it's Nothing you do not need to make another recursive call.
Merged
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Superseded by #427 |
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I'm guessing more will need to be done to get this merged, but I think it would be pretty useful.