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From: Melzzzzz <mel@zzzzz.com>
Newsgroups: comp.programming
Subject: Re: Two object oriented methods, which is better?
Date: Thu, 18 Sep 2014 20:46:16 +0200
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On Thu, 18 Sep 2014 21:40:19 +0300
Victor Porton <porton@narod.ru> wrote:

> [Sorry for multiple postings, but traffic of comp.object is so low
> (as I found after my posting there), that almost nobody will suffer
> of my multiple posting.]
> 
> If I want to push a specific (for a given subclass) value into an
> array argument of a method, should I just pass the value of the
> argument to a method which would modify it, or should I create a
> method which just returns 
> the list of additional values (and use it in the first mentioned
> method)?
> 
> Pseudocode (with "#" starting comments) for a method f:
> 
> # modify_array is a dynamic method
> function f(object, array) {
>   object->modify_array(array);
> }
> 
> or
> 
> # common_array_members is a dynamic method
> function f(object, array) {
>   array = concat(array, object->common_array_members());
> }
> 
> What is more object oriented? Which is better?

First can do whatever with array, while second shows clear
intent.
I'll go with second since it is clearer what function does.