From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-02-24T23:03:35+09:00
Subject: Re: passing method references in python & ruby

Gregory Marton wrote:
> What bugs me about ruby is that I can't do this
> def add_one(n)
>   n + 1
> end
> [3,6,8].map(add_one)
>  => [4,7,9]

[3,6,8].map(&method(:add_one))
#=> [4, 7, 9]

And yeah, it'd be nice if there was a more concise syntax than that, but 
that's what we've currently got. Thinking about it, you could do something 
like this if you want a shorter syntax:

class Symbol
  def -@()
    method(self)
  end
end
[3,6,8].map(&-:add_one)

But that's kinda hackish.


HTH,
Sebastian
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