Method: Module#wrap_method

Defined in:
lib/core/facets/module/wrap_method.rb

#wrap_method(sym, &blk) ⇒ Object Also known as: wrap

Creates a new method wrapping the previous of the same name. Reference to the old method is passed into the new definition block as the first parameter.

class WrapExample
  def foo
    "foo"
  end

  wrap_method(:foo) do |old_meth, *args|
    old_meth.call + '!'
  end
end

example = WrapExample.new
example.foo #=> 'foo!'

Keep in mind that this cannot be used to wrap methods that take a block.

CREDIT: Trans



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# File 'lib/core/facets/module/wrap_method.rb', line 27

def wrap_method( sym, &blk )
  old = instance_method(sym)
  define_method(sym) { |*args| blk.call(old.bind(self), *args) }
end