Beefy Boxes and Bandwidth Generously Provided by pair Networks DiBona
We don't bite newbies here... much
 
PerlMonks  

Answer: How do i find $a and replace it with $b when it's preceded by $c?

( #17850=categorized answer: print w/ replies, xml ) Need Help??

Q&A > regular expressions > How do i find $a and replace it with $b when it's preceded by $c? contributed by nuance

A postivive look behind clause in the regular expression will do what you want.
my($a, $b, $c, $d) = qw{foo bar moo moofooyou); $d =~ s/(?<=$c)$a/$b/g;
produces moobaryou in $d

Comment on Answer: How do i find $a and replace it with $b when it's preceded by $c?
Download Code
Log In?
Username:
Password:

What's my password?
Create A New User
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others examining the Monastery: (6)
As of 2014-04-17 22:59 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    April first is:







    Results (458 votes), past polls