From: Robert Klemme <shortcutter@...>
Date: 2010-07-23T18:01:24+09:00
Subject: Re: Snippet to append code to method

2010/7/23 Ray K. <raineronrails@gmail.com>:
> Hello from Germany,

Hi Timezonefellow,

> I'm looking for a brief snippet that I've seen somewhere lately, but
> can't remember where.
>
> It did override Object so one could add code to an existing method -
> without just overriding it.
>
> Anyone have a clou? I'll keep looking, maybe I can provide more details
> later.

Rainer, vielleicht meinst Du so etwas?

irb(main):001:0> class Foo
irb(main):002:1>   def bar
irb(main):003:2>     puts "bar"
irb(main):004:2>   end
irb(main):005:1> end
=> nil
irb(main):006:0> f = Foo.new
=> #<Foo:0x1015ce1c>
irb(main):007:0> f.bar
bar
=> nil
irb(main):008:0> class Foo
irb(main):009:1>   alias _bar bar
irb(main):010:1>   def bar
irb(main):011:2>     puts "new bar before"
irb(main):012:2>     _bar
irb(main):013:2>     puts "new bar after"
irb(main):014:2>   end
irb(main):015:1> end
=> nil
irb(main):016:0> f.bar
new bar before
bar
new bar after
=> nil
irb(main):017:0>

Cheers

robert


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