From: "Iñaki Baz Castillo" <ibc@...>
Date: 2011-08-15T00:47:46+09:00
Subject: How to use "case" to match class names? (=== not so funny)

Hi, easy example of what I need:

-------------------
  klass = String

  case klass
  when String
    puts "I'm String class"
  else
    puts "I'm nothing..."
  end
-------------------

It produces "I'm nothing...". I understand why:

"case" matches the given object using "===", and:

  String === String
  => false

while:

  String === "a new string"
  => true


But in my case, klass variable holds a class rather than a class
instance. How could I use it within the above "case" statement? The
only way I've found is:

------------------------
  klass = String

  case klass.name
  when "String"
    puts "I'm String class"
  else
    puts "I'm nothing..."
  end
-----------------------

But that is a *terrible* hack I hate. Any better suggestion?

Thanks a lot.

-- 
Iñaki Baz Castillo
<ibc@aliax.net>