#!/usr/bin/env ruby

def flaw_demo
   cl_selector="A String instance".class
   case cl_selector
   when String
      puts "flaw_demo: This is, where the control flow should be."
   when Regexp
      puts "flaw_demo: Hi Regexp!"
   else
      puts "flaw_demo: The control flow should not reach this line."
   end # case
end ; flaw_demo()

CONST_1=42
CONST_2=99

def works_ok
   i_selector=42
   case i_selector
   when CONST_1
      puts " works_ok: This is, where the control flow should be."
   when CONST_2
      puts " works_ok: Hi CONST_2!"
   else
      puts " works_ok: The control flow should not reach this line."
   end # case
end ; works_ok()

# Console output:
#     flaw_demo: The control flow should not reach this line.
#      works_ok: This is, where the control flow should be.