NULL
NULL
The Absence of Value in Computing
About the Book
A meditative analysis on all of the uses and misuses of NULL values in computing.
About the Author
Table of Contents
- Introduction
- NULL Around the World!
- Chapter X - A Brief History of NULL
- NULL Before Computing
- The Inventor of NULL
- Early Programming Languages
- The Development of NULL Values
- The Introduction of C
- NULL Usage in Databases During the 1970’s
- Chapter X - Different Kinds of NULL
- Chapter X - Uses and Misuses of NULL
- Uses of NULL in Computing
- Misuses of NULL
- Chapter X - The Use of NULL in Computer Programming
- Programming vs. Query vs. Scripting
- Style Choices
- Chapter X - NULL in Programming Languages
- LISP
- FORTRAN
- QBASIC
- Chapter X - NULL in Scripting Languages
- NULL in Python
- NULL in PowerShell
- Chapter X - NULL in Query Languages
- NULL in SQL
- NULL in XQuery
- Introduction
The Leanpub 60 Day 100% Happiness Guarantee
Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.
You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!
So, there's no reason not to click the Add to Cart button, is there?
See full terms...
Earn $8 on a $10 Purchase, and $16 on a $20 Purchase
We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.
(Yes, some authors have already earned much more than that on Leanpub.)
In fact, authors have earnedover $13 millionwriting, publishing and selling on Leanpub.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
