Hi Sebastian, Thanks for that info! It's much more thorough than what I discovered about this. I'll keep it in mind as I delve deeper...
Thanks, James On Thu, Nov 22, 2018 at 1:58 PM James Kerwin <jkerwin2...@gmail.com> wrote: > Ahhh sorrry to reply to my own post but I found this: > > https://stackoverflow.com/questions/29302181/what-is-in-perl-for > > I assume then that if " guess_doc_type" evaluates to false it moves on to > the defined subroutine. My problem is that I can't find where " > guess_doc_type" is defined... which is not a problem for this list to solve! > > Thanks, > James > > On Thu, Nov 22, 2018 at 1:48 PM James Kerwin <jkerwin2...@gmail.com> > wrote: > >> Hi All, >> >> I'm looking through some Perl files for software we use and I noticed >> this in one of the config files: >> >> $c->{guess_doc_type} ||= sub { >> >> All other similar config files show a similar structure, but without the >> "||" before the equals sign: >> >> $c->{validate_document} = sub { >> >> My question is, what is the "||" doing in the first example? >> >> It would be useful to know before I go changing anything. My instinct is >> that it's an "or" but that really doesn't make sense in this context. >> >> I've attempted to Google this, but found no solid answer. >> >> Thanks, >> James >> >
