Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

Re: Scurbbing a string

by moritz (Cardinal)
on Aug 24, 2007 at 21:03 UTC ( #634964=note: print w/replies, xml ) Need Help??


in reply to Scrubbing a string

Use regexes with char classes:

#!/usr/bin/perl use warnings; use strict; my $allowed = "pure"; my $re = quotemeta $allowed; my $str = "p u+r-e"; $str =~ s/[^$re]//g; print $str, "\n";

Replies are listed 'Best First'.
Re^2: Scurbbing a string
by FunkyMonk (Chancellor) on Aug 24, 2007 at 21:09 UTC
    I always believed that there wasn't interpolation inside a character class.

    ++moritz

      I would have thought the same. But you could get around it by building your RE as a string and then putting that into the s///:
      my $allowed = "pure"; my $re = "[^\Q$allowed\E]"; my $str = "p uuu+tr-ed"; $str =~ s/$re//g; print $str, "\n";

      Caution: Contents may have been coded under pressure.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://634964]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others taking refuge in the Monastery: (4)
As of 2021-04-15 06:07 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?