The Book of Ruby

Removing Methods

Recall you created a new method earlier (dynamic.rb) using send to call define_method and passed to it the name, m, of the method to be created plus a block, &block, containing the code of the new method:

dynamic.rb

def addMethod( m, &block )
    self.class.send( :define_method, m , &block )
end

In addition to creating new methods, sometimes you may want to remove existing methods. You can do this using remove_method within the scope of a given class. This removes the method specified by a symbol from a specific class:

rem_methods1.rb

puts( "hello".reverse )  #=> olleh
class String
    remove_method( :reverse )
end
puts( "hello".reverse )  #=> undefined method error!

If a method with the same name is defined for an ancestor of that class, the ...