Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic
 
PerlMonks  

Re^3: Extraneous behaviour of match variables

by ikegami (Pope)
on Nov 03, 2006 at 15:41 UTC ( #582107=note: print w/replies, xml ) Need Help??


in reply to Re^2: Extraneous behaviour of match variables
in thread Extraneous behaviour of match variables

(?:(?<!video).)+ is wrong.

for my $re ( qr/"(?:(?!video).)+"/, qr/"(?:(?<!video).)+"/, qr/"(?:.(?<!video))+"/, ) { print("$re\n"); for ( '"...video..."', '"...video"', '"video..."', '"video"', ) { print("$_: ", /$re/?1:0, "\n"); } }
(?-xism:"(?:(?!video).)+") "...video...": 0 "...video": 0 "video...": 0 "video": 0 (?-xism:"(?:(?<!video).)+") "...video...": 0 "...video": 1 <----- XXX "video...": 0 "video": 1 <----- XXX (?-xism:"(?:.(?<!video))+") "...video...": 0 "...video": 0 "video...": 0 "video": 0

(?:(?!video).)+ and (?:.(?<!video))+ should be equivalent. You can do benchmarks to be sure.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://582107]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others scrutinizing the Monastery: (10)
As of 2017-01-24 17:40 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Do you watch meteor showers?




    Results (208 votes). Check out past polls.