Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

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

by Roy Johnson (Monsignor)
on Jul 14, 2005 at 22:01 UTC ( #475065=note: print w/ replies, xml ) Need Help??


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

A tad simpler looping, and case-insensitive:

my $foo = 'Fsih my test variable is fsihd or is it gfsih or gfsihd f +sih'; my $from = 'fsih'; my $which = 3; my $to = 'FISH'; # makes it easy to see $foo =~ /\Q$from\E/ig for (1..$which); substr($foo, pos($foo) - length($from), length($from), $to) if pos($fo +o); print "Foo = $foo\n";

Caution: Contents may have been coded under pressure.


Comment on Re^2: Replacing a specfied instance of a pattern in a string
Download Code
Re^3: Replacing a specfied instance of a pattern in a string
by ikegami (Pope) on Jul 14, 2005 at 22:48 UTC
    That reminds me of /c!
    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"); scalar $str =~ /\G.*?$regexp/gc while --$instance; $str =~ s/\G(.*?)$regexp/$1$replace/; print("$str\n");

    The /c is needed in case there are less than $instance instances of the search string.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://475065]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (10)
As of 2015-07-07 10:28 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (88 votes), past polls