#!/usr/bin/env perl
use strict;
use warnings;
die "Usage: blah blah\n" unless @ARGV;
my $regex = qr/@{[shift]}/;
/$regex/ && print while <>;
It certainly won't beat /bin/grep in speed, but you can give it cooler regexps. Note that this version takes any number of files as input. And it differs from /bin/grep in one important point: it returns a 0 status even when it finds no matches.
Also watch out for regexp characters that have special meaning to the shell.
Update: fixed stray -w in first line.
-
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.
|