From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-06-14T23:34:33+09:00
Subject: Re: sorting arrays within an array by the first object in...


On Jun 13, 2007, at 8:45 AM, James Edward Gray II wrote:

> On Jun 13, 2007, at 8:39 AM, Mike Dershowitz wrote:
>
>> I have a parent array of child arrays.
>>
>> Each child array contains a set of objects.  These objects are all  
>> from
>> the same model.
>>
>> I know that each child array contains at least one object.  I want to
>> sort on a field in the first object in each child array, and  
>> arrange the
>> child arrays in the parent array according to that field in the first
>> object in the child arrays.  What's the best way to do this?
>
>   parent_array.sort_by { |child_array|  
> child_array.first.field_name_here }
>
> If I understood the question correctly.
>
> James Edward Gray II
>
You have to wonder though... If you need the parent sorted, do you  
also need the child arrays each sorted? Or do you want them as they  
come in?