From: Joel VanderWerf <vjoel@...>
Date: 2008-06-06T02:40:31+09:00
Subject: Re: why cannot i put conditions in when clause

Junkone wrote:
> irb(main):003:0> case a
> irb(main):004:1> when 0
> irb(main):005:1> puts "0"
> irb(main):006:1> when >0
> irb(main):007:1> puts "greater"
> irb(main):008:1> end
> SyntaxError: compile error
> (irb):6: syntax error, unexpected '>'
> when >0
>       ^
>         from (irb):8

It's not an expression.

You can do this:

case
when a==0
when a>0
end

or

case a
when 0
when 0..MAX_EXPECTED_VALUE_FOR_A
end

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407