From: dblack@...
Date: 2006-06-26T09:27:09+09:00
Subject: Re: Stumped:beginners question

Hi --

On Mon, 26 Jun 2006, Cliff Cyphers wrote:

> On Mon, Jun 26, 2006 at 08:57:05AM +0900, Pete Yandell wrote:
>> I'm just going to rewrite this, because there are a bunch of bad
>> things in it.
>>
>> def ask(question)
>>   response_is_valid = false
>>   result = false
>>   while !response_is_valid
>>     puts question
>>     reply = gets.chomp.downcase
>>     case reply
>>       when 'yes'
>>         result = true
>>         response_is_valid = true
>>       when 'no'
>>         result = false
>>         response_is_valid = false
>>       else
>>         puts 'Please answer "yes" or "no".'
>>     end
>>   end
>>   result
>> end
>>
>
> much simpler than using the case statement:
>
> def ask(question)
>  puts question
>  reply = gets.strip.downcase
>  while ("#{reply}" != "yes") && ("#{reply}" != "no")

You're working too hard :-)  No need to do string interpolation:

   while (reply != "yes") && (reply != "no")

or even:

   until %w{ yes no }.include?(reply)


David

-- 
David A. Black (dblack@wobblini.net)
Ruby Power and Light, LLC (http://www.rubypowerandlight.com)

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