Tips & Tricks for your 4D Apps – December Edition

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. Utility Method Returns Index based on queryString
2. Use named placeholders to handle spaced field names in ORDA queries
3. Use the “On Backup Shutdown” Method to Alert Administrators of Backup Fail
4. Multiple Ways to Print to PDF Programmatically
5. Collection .sort() Function
6. ProcDump requires admin permissions to run
7. Username and password not accepted (535-5.7.8 smtp.gmail.com error)
8. Utility Method to Reduce Collections
9. Use GOTO OBJECT Command to Dynamically Set Next Object in Entry Order
10. FileClass .getAppInfo() on Mac
11. Utility Method Filter Collection for Desired Type
12. Including images in HTML emails converted from WP documents
13. Utility Method to Escape Strings for URLs
14. Spotting memory leaks with info reports component
15. Hotkeys to Choose a Different Data File Upon Opening a Database
16. Considering Daylight Savings
17. Properly Restrict Users from Having Designer Rights
18. “The database or component needs to be recompiled” error
19. Filtering commands in debug log 6
20. Defining the Set of Characters to be used by 4D Web Serve