Copies files from nested folders into one source, flat directory.

Is this file the same as that file? The files may or may not be binary. We could compare the modify dates, or the sizes. But, those are not very accurate to know if a file has really changed.

Introducing MD5 Checksum. We can feed the files into Digest::MD5 in binary mode.

This is a great way to do Incremental Backups.

This is also an easy way to verify checksums when downloading files from the internet which list their MD5 Checksums.

You'll need the Digest::MD5 Perl Module.

Need to GZip a file using Perl?

Use Compress::Zlib.

This is a simple perl script which creates a GZip file.

Class method to read a binary file and copy it to a byte array.

Prints the user's IP address and localtime on a web page.

This is a little example of how to use threads in Perl. It creates three threads and runs them... That's it...

Write a set of bytes into a so-called binary file. The point is that we use BinaryWriter here and we have a byte array as input.

Just a simple check to make sure that a person's email address matches their domain.

For example .. in a form you have 2 textboxs .. 1 for their website url, the other for their email address. This checks to see if the domains for the email address and the website url match.

Simple function to check for a valid email address. Makes sure the @ and a . are in the right place. There is most likely a perl package on CPAN that would be more extensive, but this happens to work for my uses.

A little function that returns a greeting based on the local time.