From: Phil Meier <phil.meier@...>
Date: 2007-07-24T18:59:59+09:00
Subject: case equality question

Hello

I do not understand the following code:

======
file = File.open('test.txt', 'r')
hash = {'file' => file, 'title' => 'title'}
hash.map { | param_key, param_value |
   puts "param_key = #{param_key}"
   puts "param_value = #{param_value}"
   puts "(param_value === String) = #{(param_value === String)}"
   case param_value
     when String
       puts "This is a String!"
     when File
       puts "This is a File!"
     else
       puts "Neither String nor File!!!"
   end
}
file.close
===

When I run this code the output is as follows:
param_key = title
param_value = title
(param_value === String) = false
This is a String!
param_key = file
param_value = #<File:0x2b689b8>
(param_value === String) = false
This is a File!

Why does Ruby goes to the when String case even if (param_value === 
String) is false?

BR Phil