user=> (group-by identity "abracadabra")
{\a [\a \a \a \a \a], \b [\b \b], \r [\r \r], \c [\c], \d [\d]}
OnesimusUnbound
on Mon, 01 Aug 2011
user=> (group-by identity "abracadabra")
{\a [\a \a \a \a \a], \b [\b \b], \r [\r \r], \c [\c], \d [\d]}