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.

Checks to see if a file or folder exists
The fFile variable determines whether you're
looking for a File (True) or Folder(False)
The strName variable holds the fully qualified
path you're looking For

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.

This perl function will output to a file of your choosing the current localtime as defined by perl's localtime function. It will output the date in ISO 8601 date format plus the current localtime such as:
2006-08-21 09:26:35 am
The function also returns the localtime without the date to the calling environment.

Usage:
found('asdf',@array);

P.S. In perl 5.10 can be written as
use 5.010;
'asdf'~~@array;

Digest::MD5 is core from 5.8.

This function loads an File into an String.

Open a File For Input

this function returns the aggregated size
of all files in a directory and its subdirectories

Retrieve information about a file