From: Ryan Davis <ryand-ruby@...>
Date: 2012-11-13T07:57:36+09:00
Subject: Re: Efficient way for comparing records between 2 large files (16 million records)


On Nov 12, 2012, at 14:21 , Ruby Student <ruby.student@gmail.com> wrote:

> I have two large files, about 16 million records each.
> The files are sorted.
> The first 13 characters are used as a key.
> We get an updated file every week.
> We also keep the previous week file.

You or someone else posted this exact problem just a few weeks ago. Please don't repost if that was you. Please don't post your homework regardless. We're happy to answer questions and give advice. We're not happy to directly contribute to your grade.