Snipplr

(Perl) Renumber the files in a directory, or prefix file names with numbers - noah

Fri, 15 Jan 2010 16:16:57 GMT

Useful for renumbering frames to feed into `ffmpeg`

(Perl) grep with Perl - noah

Thu, 05 Feb 2009 13:29:59 GMT

A combination of the instructions in the book _Minimal Perl_ and [this Perl one-liners page](http://sial.org/howto/perl/one-liner/) The general form of the one-liner is: > perl -wnl -e '/REGEX/ and print $ARGV." $.: $_"; close ARGV if eof' The example below shows how to print the hex colors that are defined in a [Sass](http://haml.hamptoncatlin.com/docs/rdoc/classes/Sass.html) source tree.

(Perl) Rake routes filtering with Perl - noah

Sat, 08 Nov 2008 11:29:05 GMT

(Perl) lwp-request - noah

Mon, 25 Feb 2008 12:28:41 GMT

(Perl) Generate XHTML on the command line with XML::API::XHTML - noah

Sun, 10 Feb 2008 02:21:23 GMT

Build a simple XHTML document, format it with Tidy and print the result to "temp.html." You may first need to `cpan XML::API::XHTML`, and install Tidy using your favorite package manager, or just [download Tidy by itself](http://tidy.sourceforge.net/#binaries) ### If you can't install XML::API::XHTML On my system, CPAN complained that "make test had returned bad status" during installation of XML::API::XHTML. To solve this I started the CPAN shell (just type `cpan`) and then forced the install, like this: cpan> force XML::API::XHTML

(Perl) Automated UI test with Selenium-RC, WWW::Selenium and Test::More - noah

Sat, 15 Sep 2007 10:49:16 GMT

In order for this to work, the Selenium-RC server must be running. See also the tutorial at http://search.cpan.org/~mschwern/Test-Simple-0.71/lib/Test/Tutorial.pod

(Perl) search and replace across multiple files with Perl - noah

Wed, 04 Jul 2007 20:00:52 GMT

A couple of useful snippets from an article I found at Perl.com **Perl search-and-replace on the command line.** All of these should be usable under Cygwin as well. But remember that bash wants single-quoted strings but MS-DOS shell wants strings to be double-quoted.

(Perl) Grab linked files from a list of web pages - noah

Tue, 03 Jul 2007 22:31:30 GMT

## how to use `perl grabit.pl urls_for_download.txt` Expects as argument the name of a file containing a newline-delimited list of URLs: http://example.com/coolstuff http://example.com/coolstuff/fun http://example.com/videos/explosions When invoked, launches an interactive shell that asks what type of file should be downloaded. Then downloads all the files that are linked from each of the listed Web pages. Note that the location of the download folder is hard-coded to `c:/windows/desktop/grabit/` so you may want to change that before trying. This script is also [available on Github](http://github.com/textarcana/scrapers/blob/643e6e7cb349fa94cbc3fc88e1d55c7b6a262d11/grabit.pl) ## Wait! Do you know about WGet and Curl? This script is legacy. People seem to like it (hey, I still use it) but today I would probably not write my own tool to download multiple files off remote sites. Instead I would likely just use a command-line Web browser like [WGet](http://lifehacker.com/software/top/geek-to-live--mastering-wget-161202.php 'Gina Trapani of Lifehacker, on the way of the WGet ninja') or Curl. [LWP-Request would also do the trick](http://snipplr.com/view/4063/download-linked-jpegs-from-a-web-page-on-the-command-line/) ## do not comment your code like this! For a great explanation of the rather baroque commenting style I was using circa 2001, see [Steve Yegge's excellent article on code style: *Portait of a n00b.*](http://steve-yegge.blogspot.com/2008/02/portrait-of-n00b.html) Of course, when I sit down to write a Perl script today, I [use POD](http://snipplr.com/view/18611/perl-pod-embedded-documentation-example/) to format and publish my comments.

(Perl) rename - Larry Wall's filename fixer - noah

Mon, 21 May 2007 04:49:45 GMT

Invoke this script without any arguments to see the help text. From the Perl Cookbook, Ch. 9.9.