On 12/30/11 9:58 AM, Les Mikesell wrote: > Here's a perl approach: which, unlike all the other versions, doesn't require the data be pre-sorted, by virtue of adding all the tuples to a hash. I don't even think that sort in the output loop is required, unless you want the groups output in alphabetic order. -- john r pierce N 37, W 122 santa cruz ca mid-left coast