Beefy Boxes and Bandwidth Generously Provided by pair Networks Cowboy Neal with Hat
Don't ask to ask, just ask
 
PerlMonks  

Re^3: Replacing a specfied instance of a pattern in a string

by ikegami (Pope)
on Jul 14, 2005 at 21:36 UTC ( #475058=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Replacing a specfied instance of a pattern in a string
in thread Replacing a specfied instance of a pattern in a string

my $str = 'Fsih my test variable is fsihd or is it gfsih or gfsih +d fsih'; # 1111 2222 3333 + 4444 my $substr = 'fsih'; my $regexp = qr/\Q$substr\E/; my $replace = 'fish'; my $instance = 3; # 3rd print("$str\n"); my $pre_count = $instance - 1; $str =~ s/((?:$regexp.*?){$pre_count})$regexp/$1$replace/; print("$str\n");

You might have noticed both of these are case sensitive. Both can be made case-insensitive. The non-regexp version is most likely much faster. The regexp version can handle regexps instead of constant strings.


Comment on Re^3: Replacing a specfied instance of a pattern in a string
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://475058]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (11)
As of 2014-04-18 13:30 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    April first is:







    Results (468 votes), past polls