On Fri, May 22, 2009 at 11:22:25AM -0400, Uri Guttman wrote: > >>>>> "SB" == Samuel Baldwin <[email protected]> writes: > > SB> A bit of a side question; when would you ever want to try and match an > SB> empty regex? Wouldn't it be semantically saner to use defined? > > i did mention a common use in split( //, ... ). that explodes a string > into an array of all the chars which is useful sometimes. and that is > always an null regex afaik. it has the same effect as m/(.)/s in a list > context. > > and defined has nothing to do with m//. m// matches a null string or > anywhere between chars. it would work on an undefined value but trigger > the usual warning.
A sane use would be as a parameter to a function that takes a filter pattern, in a case where you don't want to filter anything out. Since // always matches, it turns the match into a no-op. _______________________________________________ Boston-pm mailing list [email protected] http://mail.pm.org/mailman/listinfo/boston-pm
