From: ts <decoux@...>
Date: 2001-09-10T00:09:43+09:00
Subject: [ruby-talk:21021] Re: Method parameter

>>>>> "C" == =?iso-8859-1?q?Carlos?=  <iso-8859-1> writes:

C> I have an object with a method that receives a
C> function. How can I pass the function to the method
C> without enclosing it in a block?

 You can use #method

pigeon% cat b.rb
#!/usr/bin/ruby
class MyClass
   def initialize
      @var1, @var2 = 1, 2
   end
   def set_fn (fp = nil)
      @fn = if block_given?
               Proc.new
            else
               fp
            end
   end

   def calculate
      @res = @fn.call(@var1, @var2)
   end
end

def my_fn (arg1, arg2)
   arg1 + arg2
end

my_object=MyClass.new
my_object.set_fn method(:my_fn)
p my_object.calculate
my_object.set_fn { |a, b| my_fn(a, b) } # OK!
p my_object.calculate
pigeon% 

pigeon% b.rb
3
3
pigeon% 


Guy Decoux