From: dblack@...
Date: 2006-07-21T04:19:33+09:00
Subject: Re: Using .each with constructors

Hi --

On Fri, 21 Jul 2006, Mike Harris wrote:

> Ben Zealley wrote:
>
>> Is there a nice elegant way of creating several named objects of the
>> same class? I naively tried
>> 
>> a,b,c,d = 0
>> [a, b, c, d].each { |o| o = SomeClass.new }
>> 
>> and found that while they get initialised inside the block, they get
>> destroyed leaving it. I can't believe
>> 
>> a = SomeClass.new
>> b = SomeClass.new
>> etc.
>> 
>> is the best way to do it. I can populate an array, but let's
>> hypothesise that for reasons relating to irritating corporate coding
>> standards, the variables need specific names... ;)
>> 
>> Thoughts appreciated! Cheers
>>
>> 
> The parallel assignment/array expansion approach suggested by patrick and 
> james will definitely work.  You could also try
>
> [:a,:b,:c,:d].each { |x| eval "#{x} = SomeClass.new" }

That won't work.  The variables will be local to the eval, and not
available outside it.


David

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