From: David Jacobs <developer@...>
Date: 2011-05-12T02:53:07+09:00
Subject: Re: Scope problem (?) in implementing Design Patterns in Ruby

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Correction: My bad, your version of All_basic doesn't inherit from
Expression like I thought it would from the pattern it follows.

On Wed, May 11, 2011 at 1:51 PM, David Jacobs <developer@wit.io> wrote:

> I think the second link points to the wrong pastie.
>
> I can see a couple of problems with the code, first of which is that you
> are setting up Expression.new to require an argument but not passing it an
> argument when you call All_basic.new, etc.
>
> More than design patterns (which I think are a little much here), I would
> suggest looking into Ruby's higher order functions like reduce and map. They
> make your code a lot simpler. This is an alternate implementation I did. Let
> me know what you think:
>
> http://www.pastie.org/1889838
>
> On Wed, May 11, 2011 at 1:20 PM, RichardOnRails <
> RichardDummyMailbox58407@uscomputergurus.com> wrote:
>
>> Hi,
>>
>> I'm hoping that employing "Design Patterns in Ruby" will lead to less
>> coding errors and more easily maintained code.  I'm stuck with the Not
>> pattern in the File Finding pattern in Chapter 15.
>>
>> I've posted my code and output in http://www.pastie.org/1889586 and
>> http://www.pastie.org/188968, respectively.  Any idea about the cause
>> of the reported syntax error?
>>
>> Thanks in Advance,
>> Richard
>>
>>
>

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