From: dblack@...
Date: 2007-08-09T20:53:24+09:00
Subject: Re: Collect objects from an array based on one unique parame

Hi --

On Thu, 9 Aug 2007, Robert Klemme wrote:

> # 2. alternative impl.
> selection.things.

I think you mean selection = things :-)

>  inject({}) do |h,th|
>    h[th.name] = h.has_key? th.name ? nil : th

When I tried your code I found you need parens:

   h[th.name] = h.has_key?(th.name) ? nil : th

Otherwise it's like:

   h[th.name] = h.has_key? (th.name ? nil : th)

and you get [false, false, false, ...].


David

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