From: Jeff Swope <jeff.swope@...>
Date: 2008-03-09T09:22:26+09:00
Subject: Re: A question on singleton methods

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On Sat, Mar 8, 2008 at 6:34 PM, mike leonard <mikeleonard@gmail.com> wrote:

> Hello,
>
> I have a hash full of objects, like so:
>
>    a_hash = { :a => "alpha", :b => "beta" }
>
> I don't I need to define a singleton method for one of the items in
> the class. I thought I could do:
>
>    def a_hash.fetch(:a).to_s
>        "ALPHA"
>    end
>
> But all this gets me is a big fat error:
>
>    t.rb:2: syntax error, unexpected tSYMBEG, expecting ')'
>    def a_hash.fetch(:a).to_s
>                      ^
>
> This is just a minimal example. In real life, the objects in the hash
> have been generated programatically, so I don't have variable
> references for them -- just the keys.
>
> Is it possible that there is a way around this error? If not, is there
> another way to do what I'm trying to do? I'm pretty new to this, so
> apologies in advance if it is an obvious mistake.
>
> Thank you,
>
> Mike Leonard
>
>

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