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Many people spend hours clicking and typing to perform repetitive tasks, unaware that the machine they’re using could do their job in seconds if they gave it the right instructions. A computer is like a Swiss Army knife that you can configure for countless tasks. This is the power of computer programming. My roommate and his co-workers took an extra-long lunch that day. The actual program took only a few seconds to run. He was still new to programming, so he spent most of his time looking up documentation in a programming book. “You know, I could write a program to do that if you have the original file for the printouts,” my roommate told them, when he saw them sitting on the floor with papers scattered and stacked all around.Īfter a couple of hours, he had a short program that read a competitor’s price from a file, found the product in the store’s database, and noted whether the competitor was cheaper. For each product price, they would look up their store’s price and note all the products that their competitors sold for less. A team of three employees would print the spreadsheet onto a thick stack of paper and split it among themselves. Occasionally, the store would receive a spreadsheet of thousands of product prices from other stores. “You’ve just done in two hours what it takes the three of us two days to do.” My college roommate was working at a retail electronics store in the early 2000s. To view a copy of this license, visit or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License. shall have any liability to any person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the information contained in it. While every precaution has been taken in the preparation of this work, neither the author nor No Starch Press, Inc. The information in this book is distributed on an “As Is” basis, without warranty. Rather than use a trademark symbol with every occurrence of a trademarked name, we are using the names only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. Other product and company names mentioned herein may be the trademarks of their respective owners. No Starch Press and the No Starch Press logo are registered trademarks of No Starch Press, Inc. Phone: 1.415.863.9900 Library of Congress Control Number for the first edition is: 2014953114 Indexer: BIM Indexing and Proofreading Servicesįor information on distribution, translations, or bulk sales, Proofreaders: Lisa Devoto Farrell and Emelie Burnette FlemingĬompositors: Susan Glinert Stevens and Danielle Foster Technical Reviewers: Ari Lacenski and Philip JamesĬopyeditors: Kim Wimpsett, Britt Bogan, and Paula L. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher.ĭevelopmental Editors: Frances Saux and Jan Cash