Want to know what the “?!” bit in this line means in Ruby?
if command == ?!
To work it out, in IRC #ruby, use:
which executes it via eval.in. E.g.
In a nutshell, if you don’t want to go through all that, here’s what ?! does:
In newer Ruby’s:
?! => “!”
In older Ruby’s, ? used to return the ASCII code. So:
?! would return the ASCII code for ! (i.e. 33).
Nowadays you’d do it using:
which returns 33.
? is a literal in Ruby.