Lihn, Steve wrote:
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
Well, libpcre does not have a split function. One can already write a split that uses the high level Regex API. The only reason you might want to dig into regex-pcre's Text.Regex.PCRE would be if it would help efficiency. Specifically, regex-base defines a RegexContext instance which is: ( RegexLike a b => RegexContext a b (b, b, b) ) : The text before the match, the text of the match, the text after the match So you can iteratively generate the pieces that split returns. -- Chris