[Haskell-cafe] Splitting a string into chunks
Jon.Fairbairn at cl.cam.ac.uk
Fri Jan 13 17:17:53 EST 2006
On 2006-01-13 at 16:50EST Robert Dockins wrote:
> On Jan 13, 2006, at 4:35 PM, Jon Fairbairn wrote:
> > On 2006-01-13 at 13:32PST Jared Updike wrote:
> >> That works except it loses single newline characters.
> >> let s = "1234\n5678\n\nabcdefghijklmnopq\n\n,,.,.,."
> >> Prelude> blocks s
> >> ["12345678","abcdefghijklmnopq",",,.,.,."]
> > Also the argument to groupBy ought to be some sort of
> > equivalence relation.
> Humm, still not reflexive. You need xor.
ugh, yes. How about
> > blocks = map unlines
> > . filter (all $ not . null)
> > . groupBy
(\a b -> null b == null a)
> > . lines
Jón Fairbairn Jon.Fairbairn at cl.cam.ac.uk
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