Intercepting, Resuming Overridden Methods

ruby-talk
1

Is there a clean, good, easy way to do the following:

class Human; end
class Male < Human
     def laugh
         puts "Yo ho ho"
     end
end
class Female < Human
     def laugh
         puts "Tee hee"
     end
end

module Yokel
     #...special code here...
end

class Human
     include Yokel
end

m = Male.new
m.laugh
#=> "Slapping my knee"
#=> "Yo ho ho"
#=> "Snorting"

f = Female.new
f.laugh
#=> "Slapping my knee"
#=> "Tee hee"
#=> "Snorting"

2

Gavin Kistner wrote:

Is there a clean, good, easy way to do the following:

class Human; end
class Male < Human
     def laugh
         puts "Yo ho ho"
     end
end
class Female < Human
     def laugh
         puts "Tee hee"
     end
end

module Yokel
     #...special code here...
end

class Human
     include Yokel
end

m = Male.new
m.laugh
#=> "Slapping my knee"
#=> "Yo ho ho"
#=> "Snorting"

f = Female.new
f.laugh
#=> "Slapping my knee"
#=> "Tee hee"
#=> "Snorting"

I once hacked something together which might help you. It's here

And there have been lengthy discussions about the issue quite some time
ago. Guess you'll find them if you search for "method hooks".

Kind regards

    robert

3

Gavin Kistner wrote:

Is there a clean, good, easy way to do the following:

I suspect the entry below will fail in at least one
of those subjective categories :slight_smile:

class Human; end
class Male < Human
     def laugh
         puts "Yo ho ho"
     end
end
class Female < Human
     def laugh
         puts "Tee hee"
     end
end

module Yokel
  def initialize
    @meth = method(:laugh)
    self.class.class_eval do
      define_method(:laugh) do
        puts "Slapping my knee"
        @meth.call
        puts "Snorting"
      end
    end
  end
end

class Human
     include Yokel
end

m = Male.new
m.laugh
#=> "Slapping my knee"
#=> "Yo ho ho"
#=> "Snorting"

f = Female.new
f.laugh
#=> "Slapping my knee"
#=> "Tee hee"
#=> "Snorting"

daz

4

I wrote:

module Yokel
  def initialize
    @meth = method(:laugh)
    self.class.class_eval do
      define_method(:laugh) do
        puts "Slapping my knee"
        @meth.call
        puts "Snorting"
      end
    end
  end
end

Shorter (as long as __send__ handles private method calls) ...

module Yokel
  def initialize
    @meth = method(:laugh)
    self.class.__send__(:define_method, :laugh) do
      puts "Slapping my knee"
      @meth.call
      puts "Snorting"
    end
  end
end

daz