This post originated from an RSS feed registered with Ruby Buzz by Jeremy Voorhis. Original Post: Ruby snippet: detaching a method from an object as a closure Feed Title: JVoorhis Feed URL: http://feeds.feedburner.com/jvoorhis Feed Description: JVoorhis is a Rubyist in northeast Ohio. He rambles about Ruby on Rails, development practices, other frameworks such as Django, and on other days he is just full of snark. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Jeremy Voorhis Latest Posts From JVoorhis

irb(main):041:0> "cat".method( :size ).to_proc.call          
=> 3
irb(main):042:0> str = 'CAT'
=> "CAT" 
irb(main):043:0> aproc = str.method( :size ).to_proc
=> #<Proc:0x000cc064@(irb):43>
irb(main):044:0> aproc.call
=> 3
irb(main):045:0> aproc.call
=> 3
irb(main):046:0> str << 'FISH'
=> "CATFISH" 
irb(main):047:0> aproc.call
=> 7
irb(main):048:0> newstr = ''
=> "" 
irb(main):049:0> def newstr.metaclass; class << self; self; end; end # thx _why!
=> nil
irb(main):050:0> newstr.metaclass.send :define_method, :size, &aproc
=> #<Proc:0x000cc064@(irb):43>
irb(main):051:0> str
=> "CATFISH" 
irb(main):052:0> newstr
=> "" 
irb(main):053:0> str.size
=> 7
irb(main):054:0> newstr.size
=> 7