Using an Object's method call statement

Monday, 07 June 2010 09:36

Source: Class: Object [ruby-doc.org]

Looks up the named method as a receiver in obj, returning a Method object (or raising NameError). The Method object acts as a closure in obj‘s object instance, so instance variables and the value of self remain available.



class Demo

 def initialize(n)

   @iv = n

 end

 def hello()

   "Hello, @iv = #{@iv}"

 end

end



k = Demo.new(99)

m = k.method(:hello)

m.call   #=> "Hello, @iv = 99"



l = Demo.new('Fred')

m = l.method("hello")

m.call   #=> "Hello, @iv = Fred"