How Do You Clear The IRB Console?

On Mac OS X or Linux you can use Ctrl + L to clear the IRB screen.

Throw this inside %userprofile%\.irbrc and you're good

def cls
  system('cls')
end

From IRB clear screen on windows.

On *nix boxes

`clear`

on Windows

system 'cls' # works
`cls` # does not work

on OSX

system 'clear' # works
`clear` # does not work

The backtick operator captures the output of the command and returns it

s = `cls`
puts s

would work better, I guess.