From: Ben Giddings <bg-rubytalk@...>
Date: 2007-01-24T06:15:37+09:00
Subject: Re: If-Then and "End"

On Jan 23, 2007, at 04:47, Lloyd Zusman wrote:
> Just a small point: you don't need an 'else' clause after an 'exit',
> since nothing could follow that statement.  Hence, you can just do  
> this
> if you want, and it will have the same effect:
>
>   if uinput == "EXIT" then
>     exit
>   end
>   # do something else
>
> I tend to do that with 'exit', 'return', 'raise', 'throw', 'next',
> 'redo', and 'break' statements, to avoid excessive nesting.  But  
> that's
> just a stylistic thing.

For that matter, you don't need "then" unless it's all on one line:

if uinput == "EXIT" then exit end

exit if uinput == "EXIT"

or

if uinput == "EXIT"
   exit
end

For safety reasons, you could even do:

if "EXIT" == uinput
   exit
end

this way if you accidentally use "=" instead of "==" you'll get an  
error:

Ruby will give you a warning if it spots a "=" in a conditional, but  
often you want an error instead.

Ben