Re: Proposal (Trac ticket #3671): Add takeRec, genericTakeRec and spanRec to Data.List

Ian Lynagh wrote:

...

   breaks (',' ==) "123,456,,78" == ["123", "456", "", "78"]

I wrote:

runs = groupBy . on (==) breaks p = filter (not . p . head) . runs p

Except that has slightly different semantics than Ian's: breaks (',' ==) "123,456,,78" == ["123","456","78"] -Yitz