From: ts <decoux@...>
Date: 2002-11-04T20:45:29+09:00
Subject: Re: Namespace hygenie

>>>>> "M" == Michael Schuerig <schuerig@acm.org> writes:

M> I'm not sure if I understand it correctly, but I don't think it can do 
M> what I want. Here's an exemplary case

 Well, I don't know if it will be fast

pigeon% cat myexts.rb
module MyExts
   def starts_with(s)
      index(s) == 0
   end
   def ends_with(s)
      index(s, -(s.length)) != nil
   end
   def without_prefix(p)
      return self unless self.starts_with(p)
      self[p.length..-1]
   end
end
pigeon% 

pigeon% cat somelib.rb
require 'import-module'
require 'myexts'

module SomeLib
   def some_method(s)
      s.import(MyExts) {|x| p x.without_prefix("abc")}
   end
end
pigeon% 

pigeon% cat b.rb
#!/usr/bin/ruby
require 'somelib'

class C
  include SomeLib
   def tt
      some_method("def")
      p "abc".without_prefix("def")
   end
end

C.new.tt

pigeon% 

pigeon% b.rb
"def"
./b.rb:8:in `tt': undefined method `without_prefix' for "abc":String (NameError)
        from ./b.rb:12
pigeon% 



Guy Decoux