Perl Padre IDE, Catalyst, and others

Perl is good at text processing, the following are some examples:

1. Add space between words

my $text = "ThisTextWithoutSpaces";
$text =~ s/([a-z])([A-Z])/$1 $2/g;
print $text; # This Text Without Spaces

2. Get the size of a file in bytes

$size = -s “path/to/file.txt”;

3.Running Windows? Got a file with UNIX line endings?

perl -ne "s/n/rn/; print;" linux.txt > windows.txt
# This changes 'n' to 'tn', like tr "n" "rn" 

4. Want to make a table of the number of times each word in $text appears?

my %words = ();
$words{lc($_)}++ for $text =~ /b([w']+)b/g;

Each key of the %words hash will be a word in $text, and the value is the number of times that word appeared.

5. Padre, the Perl IDE

Padre is a Perl IDE, an integrated development environment, the url is http://padre.perlide.org/.
After install Padre which also install Perl latest version (5.14), then install Catalyst, the Perl MVC framework:

$ cpanm Catalyst::Devel