From: Ammar Ali <ammarabuali@...>
Date: 2010-11-13T02:12:31+09:00
Subject: Re: help sorting objects by their instance field

On Fri, Nov 12, 2010 at 6:54 PM, Aaron Haas <aaron4osu@gmail.com> wrote:
> Thank you guys so much for your helpful posts. I just started learning
> ruby this week and it has been slow going.
>
>  I read the api on array's sort methods and I did not understand them.
>
> Does this line sort the array of persons?
>
> @persons.sort_by {|person| person.aLname}
>
> do I need to save it to a new array variable?
>
> order_array = @persons.sort_by {|person| person.aLname}

It sorts the array itself, no need to make a copy.

The documentation for sort_by is in the Enumerable mixin (which Array
includes) It's at:

  http://ruby-doc.org/core/classes/Enumerable.html#M003120

Regards,
Ammar