Retrieve the current execution call chain
When programming an application, you may need to know where you are in your code, especially when one method calls other methods, which may then call ...
July 23, 2019
1 min read
For Developers
Build better 4D applications with practical patterns and technical deep dives from our blog.
Write generic code with the latest ORDA features
ORDA has its share of features with 4D v17 R5, including various ways to write generic code. Writing generic code allows you to centralize your code ...
July 3, 2019
1 min read
Use ORDA to boost performance in Client/Server mode
Using ORDA to access large tables (especially those with relations) in Client/Server mode has been greatly enhanced. With 4D v17 R5, you’ll see 2-3xs ...
June 5, 2019
1 min read
ORDA member methods to get the structure information
"How can I know the dataClass of an entity? I need it to write generic methods". "I need information about a field in a dataClass: what is its type? I...
May 28, 2019
1 min read
Who’s who? A new way to identify users
As a 4D developer you often need to manage end users with your own directory system. For internal users, you might create a few profiles with differen...
May 15, 2019
1 min read
New 4D commands to work with encrypted data
In a previous post, we discussed how to get started with data file encryption. Now we're going to discuss an additional way to work with encrypted dat...
May 10, 2019
1 min read
Object notation to handle files and folders
4D already provides commands to handle files and folders, but what about new commands that take advantage of the power of object notation? Objects ha...
May 2, 2019
1 min read
Read 4D object fields with SQL Engine
A 4D object field is a persistent database field type, stored as binary content. Previously, reading this type of field by an ODBC driver wasn't possi...
April 19, 2019
1 min read
Formula: More power behind simplicity
The Formula command is available since 4D v17 R3. So far you might have thought of assigning a formula as a method to an object or building smart obje...
March 26, 2019
1 min read
Easily synchronize your processes
Preemptive processes are very useful for performing extensive calculations in parallel, using all of the cores in your CPU, but sometimes you need to ...
February 8, 2019
1 min read