4D Technical Articles

All articles are written by Walt Nelson; some articles are Copyright 4D Inc. or Dimensions Tech Journal. Posted with permission - see below*.

Featured Download - August 2004
Understanding Queries in 4D: the Funnel Concept by Walt Nelson

ARTICLES BY CATEGORY

4D Server Development

Part 1: Advantages of 4D Server Multi-User Development by Walt Nelson

Part 2: Setting Up a Multi-Developer Password System  by Walt Nelson

Part 3: Naming Conventions for Multi-Developer 4D Projects  by Walt Nelson

4D Memory Management

Part 1: Keeping the Memory Clean: Designing Memory-Efficient Forms  by Walt Nelson

Part 2: Keeping the Memory Clean: Writing Memory-Efficient Code   by Walt Nelson

Optimizing Record Selections

Part 1: Under the Hood of the 4D Data File by Walt Nelson &  Jean-Pierre Ribreau

Part 2: Under the Hood of the 4D Data File Pt2   by Walt Nelson & Jean-Pierre Ribreau

Optimizing Performance

Part 1: Expanding the Concept of a Keywords Subfile  by Walt Nelson

Part 2: Using 4D's Built-in Relational Search Engine  by Walt Nelson

Backup and Recovery strategies

Part 1: General Principles of Backup & Recovery  by Walt Nelson

Part 2: Automatic Backup and Mirroring with 4D Backup  by Walt Nelson

Webserver_Monitor by Walt Nelson      (A 4D application to monitor servers 24 hours a day, 7 days a week.  I use this application to monitor my clients' Web Servers. If the server goes down, this application automatically re-starts it.)

Intermediate Programming Topics

Manipulating Arrays, Strings, and Dates with 4th Dimension  by Walt Nelson Example Database (the screens are ugly, but they work!) Macintosh Windows

Using the 4D Method Flowchart Editor  by Walt Nelson

4D Conversions: V3-V6, Mac-Win, 4D Write to 6.5/Later  by Walt Nelson

Understanding the Relational Model by Walt Nelson      (A sample lesson from the course "4D Boot Camp for Beginners: Getting Up-to-Speed in 4D")

Understanding Queries in 4D: the Funnel Concept by Walt Nelson

Subforms and Hierarchical Lists

Sayonara Arealist: Creating Subforms in Native 4D  by Walt Nelson (a tutorial on subforms)

Using 4D Hierarchical Lists as Space-Savers  by Walt Nelson (HL's & how they work)

Advanced Programming Topics

The RESOLVE POINTER command  by Walt Nelson

The EXECUTE command  by Walt Nelson

Understanding the Foundation Shell by Walt Nelson

Converting a FileMaker Database to 4D - A Case Study  by Walt Nelson

Unleashing the Power of 4D Write  by Walt Nelson

Writing 4D Code in the Zone by Walt Nelson

The 4D Search Engine and Set Theory  by Walt Nelson

Webserver_Monitor by Walt Nelson      (A 4D application to monitor servers 24 hours a day, 7 days a week.  I use this application to monitor my clients' Web Servers. If the server goes down, this application automatically re-starts it.)

The Business of 4D Consulting

Should You Create a Vertical Market Product with 4D?  by Walt Nelson

The Mobile Consultant's Toolkit A guide for traveling consultants  by Walt Nelson   Seven Success Principles  by Walt Nelson

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*Some of these writings were previously been published either as 4D Technical Notes or as articles
 in the Dimensions Tech Journal.

Copyright 2002

Walt Nelson & Associates
10175 S. Tantau Ave.
Cupertino, CA 95014

Phone: (408) 832-7225
Fax: (408) 257-6054
E-mail: Walt@4DMentor.com