From: Dan Doel <djd15@...>
Date: 2003-12-17T04:54:05+09:00
Subject: Re: UnboundMethods Useless?

You can do stuff like this:

class Object
    def foo
        puts "Bar"
    end
end

u = Object.instance_method :foo

class Object
    undef foo
end

class ArbitraryClass
end

o = ArbitraryClass.new

b = u.bind o

b.call

Which isn't as generally useful, I know, but if you're constructing methods
from strings which you seem to be doing elsewhere, you can do something
like this:

class Object
    def Object.universal_method(args, code)
        eval %Q/
            def method_44518982938293(#{args})
                #{code}
            end
        /
       
        m = instance_method :method_44518982938293
       
        undef method_44518982938293
       
        m
    end
end

u = Object.universal_method %Q{foo, bar}, %Q{
    puts foo, bar
}

class ArbitrarySubclass
end

o = ArbitrarySubclass.new

b = u.bind o

b.call 2, 3

Not exactly elegant code, but it works.

- Dan