Tips & Tricks for your 4D Apps – August 2024 Edition



Tips

by Add Komoncharoensiri, Director of Technical Services at 4D Inc

Here we go with another set of tips and tricks.

The 4D Knowledge Base is a library of information about 4D technology where weekly tech tips and monthly tech notes are actively published. If you missed the last tips on the KB, that’s fine; here is a compilation from the past few weeks.

This blog post covers 20 tips:

      1. Server Not Listed in Available Servers
      2. Error related to web server launch: “Cannot create folder {drive letter}:\”
      3. Utility Method to Convert Time to Days and Hours/Minutes/Seconds
      4. Experiencing Changed Rendering of Text on Windows
      5. Warnings before doing Recover by record headers
      6. Defining 4D Write Pro page sizes
      7. Redundancy is a Good Practice For Development
      8. When to use the .orderBy() and .sort() functions
      9. Use defensive programming when hiding warnings
      10. When to Adjust Cache Priority
      11. Using .multiSort() to Sort Synchronized Collections 
      12. Basics of using Data Store and Class Store  
      13. Troubleshooting 500 internal server error 
      14. Implementing Simple Singleton Properties 
      15. Fixing Compilation Error: “Internal Error #30” 
      16. How to Programmatically Set Document Length for PDFs 
      17. Find all distinct interprocess variables 
      18. Maintenance of Low Record Count Tables with Records Created and Deleted Soon After  
      19. Computed Attributes ordering with orderBy 
      20. Enabling toolbar for 4D Write Pro when in subform 
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