great post! ++ :)

> Using strict is also a good idea for a novice — and for more venerable monks as well.)

ha! :)

Well if you mean me, when testing within the debugger using warnings and strict is a bit complicated.

EDIT:

anyway I'm still waiting to see a use-case where an isolated cmp-routine make more sense than just putting the whole logic into a dedicated sort-routine using sort within the body.

UPDATE

to answer my own question, it might make sense when cascading different sort criterias

  DB<110> @records= (["amy", 35], ["bill", 35], ["george", 28], ["jaso
+n", 35])
 => (["amy", 35], ["bill", 35], ["george", 28], ["jason", 35])

  DB<111> sub cmp_age { $::a->[1] <=> $::b->[1] }

  DB<112> sub cmp_name { $::a->[0] cmp $::b->[0] }

  DB<113> sort {cmp_age or cmp_name} @records 
 => (["george", 28], ["amy", 35], ["bill", 35], ["jason", 35])

  DB<114> sort {cmp_age or - cmp_name} @records 
 => (["george", 28], ["jason", 35], ["bill", 35], ["amy", 35])
[download]