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This Week @ the MC Press Bookstore

November 20, 2013 | Volume 12 Issue 22

ISSUE HIGHLIGHTS

TOP STORY: PHP: Variables, Arrays, and Functions: The Final Chapter
FEATURED ARTICLE: The API Corner: Verifying That Nothing Has Changed, Part 2
NEWS HIGHLIGHT: Jelastic Teams with OpenShift to Drive Standardization of PaaS Cartridges
FORUM: Convert C Prototype to RPG
TRIAL SOFTWARE: TRY MarkMagic to Solve All Your Document Design and Printing Challenges
EVENT: THE FUTURE OF RPG: The next evolution of RPG development

Sponsor - ASNA
 

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Learn more about ASNA Mobile RPG at our free Webcast Thu, Nov 21, 1pm CST or at www.asna.com/mobilerpg


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Feature Article - Programming
 
PHP: Variables, Arrays, and Functions: The Final Chapter

This is the last step in understanding how variables, arrays, and functions are similar, are different, and come together to form the basis of the PHP universe.

david shireyWritten by David Shirey

So far in this series, we have covered variables and arrays. Granted, it took us three months to cover arrays and how to display them, but let's not worry about that now.

In the process, we saw that variables were preceded by a dollar sign ($) and consisted of underscores plus any alphanumeric digits (that is, no special characters) as long as the first character after the $ was an underscore or alpha. We saw that we did not have to specify what the data type was or what the field looked like. Instead, that was determined by the type of data we put in that variable. And speaking of data types, we saw that a PHP variable could be an integer, string, floating point, object, resource, Boolean, or array.


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Feature Article - Programming
 
The API Corner: Verifying That Nothing Has Changed, Part 2

Explore more options with the Calculate Hash API.

bruce viningWritten by Bruce Vining

Last month, in Verifying That Nothing Has Changed, we saw how easy it can be to create a hash over a string such as 'Some data to be hashed' by using the Calculate Hash API. We also saw how the calculated hash value is very dependent on what data is being hashed. Something as simple as a trailing blank or a punctuation change can cause significant changes in the derived hash value. Today, we'll look at some options on how we can hash data, and we'll see that agreement between the generator and verifier of the hash value on the how is not nearly as important as the what.


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Sponsor - The MC Press Bookstore
 

Functions getting you down? RPG expert Jim Martin will rescue you with his helpful guide! Functions in Free-Format RPG IV will build upon your free-format education and teach you how to generate RPG IV programs with functions in the free-format style. This book has everything you need to know about subprocedures, ILE concepts, C functions, and IBM APIs to produce highly modularized programs. You’ll even learn how to write your own custom BIFs. Get your copy today!


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