If you are stripping out all characters from a known set then tr is the way to go for 2 reasons. Firstly, it's lightning fast. Secondly you cannot accidentally construct a pattern of more than a single character. Here is a test to demonstrate.
#!/usr/bin/env perl
use strict;
use warnings;
use Test::More tests => 1;
my $in = q/xTest-1 [ ] 'copy'.png /;
my $want = 'xTest-1copy.png';
my $have = filter ($in);
is $have, $want;
sub filter {
my $str = shift or return '';
return $str =~ tr/A-Za-z0-9.-//cdr;
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
