Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

Re: ?: and saving backreferences

by BUU (Prior)
on Dec 06, 2006 at 05:31 UTC ( #588034=note: print w/replies, xml ) Need Help??

in reply to ?: and saving backreferences

I'm rather confused as to what "because the $1 backreference is lost once you exit the scope of the if/else" means to you, to me it sounds like you think $1 is cleared after you exit the scope it was declared in, which is clearly not true.

Am I missinterpreting your statements some how?

Yeah, I was missinterpreting. Consider this retracted.

Replies are listed 'Best First'.
Re^2: ?: and saving backreferences
by ikegami (Pope) on Dec 06, 2006 at 06:10 UTC

    Did you run the code the OP posted? Since at least 5.6.1, the $1 set by the regexp inside the if is no longer in scope outside the if. The following illustrates this clearly.

    'a' =~ /(.)/; { 'b' =~ /(.)/; print("$1\n"); # b } print("$1\n"); # a

    This is documented in perlvar.

      You are quite correct and I was missinterpreting his comment. Consider it retracted.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://588034]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (4)
As of 2018-06-23 23:09 GMT
Find Nodes?
    Voting Booth?
    Should cpanminus be part of the standard Perl release?

    Results (126 votes). Check out past polls.