This is a ruby script written to emulate the UNIX command which.

For use on Windows (since it doesn't have this command by default)

which - shows the full path of commands

OPTIONS
first parameter: command to search without extension (i.e. "which ruby")
- .exe suffix is automatically added if omitted

second parameter (optional): -deep (i.e. "which irb -deep")
- used if extension unknown and not found using regular search
- will cycle through all executable command using PATHEXT variable.
- no need to add (or guess) extension for commands to search for

NOTES
if command is in multiple locations all will be returned