From: Brian Candler <B.Candler@...>
Date: 2005-07-12T18:33:45+09:00
Subject: Re: accessing index inside map

On Tue, Jul 12, 2005 at 10:04:02AM +0100, Brian Candler wrote:
>   module Enumerable
>     def altmap(meth=:each)
>       res = []
>       send(meth) { |*args| res << yield(*args) }
>       res
>     end
>   end

P.S. I note that some Enumerable methods already take arguments:
detect/find, grep, inject could have meth=:each as a later argument for
backwards-compatibility.

The only awkward ones are to_set and zip. Even then, they could be made
backwards-compatible by checking if the first argument is a Symbol and using
it as a method name in that case.

I don't really see the usefulness of the foo.to_set(klass,*args) syntax
anyway, given that it just calls klass.new(foo,*args). However, I can see
uses for
    h.to_set(:each_key)
    h.to_set(:each_value)

Regards,

Brian.