If you’re interested in the user interface, you may have already used the On before keystroke and On after keystroke events. You’ll certainly be happy to know that the handling of these events has been greatly enhanced with 4D v18 R5. In addition, a new command has been created to determine if there is ongoing input when the On before keystroke event is generated. Let’s find out more!
4D v18 R5 provides a new 4D command to open a form in the form editor. This can be especially useful for analysis or introspection tools.
Using $1, $2, and $n variables in your code not only makes the code less readable, it can also increase confusion since the human brain can find it difficult to remember what these variables correspond to. The solution is to create a variable with an understandable name and assign it the value of $1, $2, or $n.
4D v18 R5 has good news, you can now name your parameters when declaring:
- a project method,
- a trigger
- a database method
- a form method
- a constructor of a class
- a function of a class.
Let’s see how!
In the How to connect Tableau with 4D blog post, you learned how to create a web data connector (WDC) to request data from 4D and visualize it in Tableau Public.
Bonus: I’ll also show you how to debug your WDC in Tableau Public using Chrome. Let’s get started!
In 4D Webinar – How to Connect Tableau with 4D, William Taylor (Technical Account Manager, 4D US) gave an overview of the Tableau tool and how it could be used to visualize your 4D data. In this blog post, we’ll dig into the technical details to give you a deeper understanding of how it works. This will allow you to build, for example, a visual showing the highest invoice total with nothing more than 4D REST and Tableau!
by guest author Tiran Behrouz, 4D developer (Vancouver, Canada)
The introduction of ORDA in 4D v17 was a game-changer. Now with the introduction of classes in 4D v18 R3, we will witness a paradigm shift in 4D programming. We can now take advantage of object-oriented programming concepts such as polymorphism, composition, and inheritance to write our own class libraries. In this video, I demonstrate how to code a simple TimeStamp class using 4D and ORDA.
Have you ever wondered about 4D’s autocompletion feature or asked yourself why 4D suggests all functions used in the code? Since an object is a very generic type, 4D only knows what it’s really storing at runtime. However, that doesn’t help much when you’re writing your code.
4D now offers a new, alternative syntax which will greatly enhance autocompletion when declaring your variables.
Developing and debugging server code in project applications has become easier than ever in 4D v18 R4. Without further ado, let’s take a look at how to do it.
An increasing number of developers are using the Form command to link their form objects and many of you require easy programming access to the values of those objects. So, to help you access the value of a form object, regardless of its variable or expression, we’ve added two new commands: OBJECT Get value and OBJECT SET VALUE.
Let’s see how to use them!
Do you need to load web pages, extract metadata, or generate pictures from the contents of pages on a headless server? If you answered “yes”, then you’re in luck because 4D v18 R3 makes it possible! Now you can create an offscreen web area with the WA Run offscreen area command.
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