<=> The spaceship operator

The comparison operator in Ruby <=> (also called the spaceship operator) returns -1, 0, or +1 depending on whether the first value is less, equal or greater than the second value.

DebugView

DebugView is an application that lets you monitor debug output on your local system, or any computer on the network that you can reach via TCP/IP.

http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx