From: 7stud -- <bbxx789_05ss@...>
Date: 2009-04-30T15:31:23+09:00
Subject: Re: Can this code be more succinct

botp wrote:
> On 4/30/09, Mark Thomas <mark@thomaszone.com> wrote:
>> but I'm not sure whether the number of args check can be handled
>> inside the case. I tried a 'when ARGV.size > 1' but you can't put a
>> full expression in a when statement.
>>
> 
> there's another form for case.
> try this (untested),
> 
>   arg = ARGV[0]
>   case
>   when ARGV.size > 1
>      abort "too many args ;-)"
>   when /^os$/ =~ arg
>      sym = arg.downcase
>   else
>      abort "ERROR: invalid arg #{arg}"
>   end

...but then instead of having to look up the format of a case statement, 
you could just write:

val = "red"

if val == "blue"
  puts "blue"
elsif val == "red"
  abort "code red"
else
  puts "not recognized"
end

puts "program terminating normally"
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