In This May Digital Issue:

Table of Contents

COVER STORY

• Making Two-Way Tables in iOS
  By Tom Thompson
Although iOS has several Cocoa Touch classes that specialize in displaying text, the class of choice for creating tables that present a two-way flow of information is UITextField. This class is designed to capture and edit small amounts of text that the app then processes, usually immediately.


• Java Meets Objective-C
  By Genadiy Shteyman
For Java programmers, learning Objective-C is not as hard as you might expect. You just need to know how Java maps to the language and where the gotchas are. This all explained using a small social networking app (in both languages) as an example.


• Open, Extensible, Standards-Compliant: Are you sure that’s what you want?
  By Mike Rozlog
Many software projects needlessly saddle themselves with requirements that they think they need, but which frequently just add to overhead and delay. Open, extensible, and standards-compliance should be more than check-box items. Add them only to the extent your project needs them.


• From the Vault: Ternary Search Trees
  By Jon Bentley and Robert Sedgewick
This seminal article from 1998 by two luminary algorithm specialists presents a new data structure, ternary search trees, which combine the time efficiency of digital tries with the space efficiency of binary search trees. The resulting structure is faster than hashing for many typical search problems, and supports a broader range of useful problems and operations.


• Letters
  By you
From the changing face and shape of documents, to the cost of bad requirements, to RIM's potential problems, Dobb’s readers had lots to say.


• Links
  
Snapshots of the most interesting articles on drdobbs.com: Recasting pointers safely at runtime, authenticating images, teaching C++ badly, and the Language of the Month.

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