From: Robert Klemme <shortcutter@...>
Date: 2008-05-30T05:20:00+09:00
Subject: Re: Merge collections of objects

On 29.05.2008 20:03, John Butler wrote:
> Robert Klemme wrote:
>> 2008/5/29 John Butler <johnnybutler7@gmail.com>:
>>> Copy any employees from companyB that are not in companyA
>>> passing through the 2 objects and the relationship in dyn_method:
>>> dyn_method = 'company_employees'
>>> companyA.send(dyn_method + '=',companyB.send(dyn_method))
>>>
> 
> Thats pretty nice, as you say the struct is pretty similar to the hash
> so multiple keys can be checked for duplicates.  This is how i have it
> working now but i may change to your solution above.  My solution doesnt
> feel the most effecient.
> 
> for obj in company_b.send(dyn_method)
>   if !company_a.send(dyn_method).detect { |t| t.id == obj.id}
>    company_a.send(dyn_method) << obj
>   end
> end

Efficiency large depends on the sizes of collections involved.  Your 
approach can actually be faster for smaller sets.  You have to measure it.

Kind regards

	robert