[Haskell-cafe] Missing join and split

[Lihn, Steve]

Programmer with perl background would think split like:
  <list of string> = split <regex> <original string>
Since regex is involved, it is specific to (Byte)String, not a generic
list. Also it appears one would need help from Text.Regex(.PCRE) to do
that.

>     intercalate a (split a xs) = a
This identity rule does not hold for perl's join/split if regex is used.

Steve  

-----Original Message-----
On Dec 28, 2007 4:24 PM, Benja Fallenstein <benja.fallenstein at gmail.com>
wrote:
> Right; I misspoke. What I meant was that you would want a split such
that
>
>     intercalate a (split a xs) = a
>



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