From: James Coglan <jcoglan@...>
Date: 2009-03-20T20:39:49+09:00
Subject: Re: Passing a named function instead of a code block?

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2009/3/20 Paul Jungwirth <once@9stmaryrd.com>

> Okay, now how about when you want to reference a method on an instance?
> For example:
>
> #!/usr/bin/env ruby
>
> class Adder
>    def initialize(n)
>        @n = n
>    end
>
>    def use(x)
>        x + n
>    end
> end
>
>
> a = Adder.new(5)
>
> print [1, 2, 3, 4].collect(&method(:a.use))
>
> This doesn't work. It looks like : binds tighter than .. But :(a.use)
> doesn't work either. Any suggestions?


a.method(:use)

See docs for Object#method:
http://ruby-doc.org/core/classes/Object.html#M000338

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