4D v17 introduces a new concept: ORDA. If you’re not familiar with ORDA yet, we’ve created a series of blog posts to explain how to use and take advantage of ORDA. When working with ORDA, you’re going to use entity selections, which are basically objects containing references to entities belonging to the same dataclass (i.e. table). One of the main benefits of ORDA, is the very simple and powerful ability of binding with forms.
In this blog post, you’ll learn how to display an entity selection in a list box. In fact, it’s very simple.
ORDA provides a great feature to channel data through filters and get aggregated values, by including a set of easily-understood aggregation operations that examine and perform calculations on the data sets. For example, the sum, average, count, min, and max methods are used to perform the operations which their names describe!
4D Write Pro packs in a lot of commands and functions allowing you to create and handle complex documents by programming, documents which include pictures and text! Today, 4D Write Pro gets its own commands to insert and read text without needing to use commands originally designed for Styled Text! Thanks to these new commands, your code takes full advantage of the 4D Write Pro programming concepts, i.e. objects and ranges. Thus, your code is more elegant and easier to read!
4D v17 goes a step further to let you create a customized server administration dialog. Following the ability to retrieve information about users & processes, getting all runtime information about 4D Web server, as well as details about the active license, you now have the ability to also retrieve all of the hardware and system details for the machine running your 4D server.
Do you need to know what OS is being used, what processor(s), how much RAM is available, etc.? Just call the new Get system info command, locally or remotely! And that’s not all, this command can be extremely useful for quickly diagnosing and solving any problems that may arise.
The ORDA series continues! In this blog post we’ll see how to use logical operators on entity selections!
These operations allow you to get intersections, unions, or differences between two entity selections like you can with classic 4D sets.
FIRST RECORD, LAST RECORD, NEXT RECORD, PREVIOUS RECORD; does that ring any bells? I bet it does. You’ve already been using them to handle selections! ORDA provides useful and familiar methods to navigate through entities in an entity selection – and obviously, some perks!
For starters, you can handle several entity selections at the same time and navigate through them independently, whereas normally you can only manage a single ‘current selection’ per table. That’s precisely what we’re going to see in this blog post.
4D Write Pro is continuously evolving; thanks to the new features and functionalities we’re shipping with every R-release. A world of possibilities is wide open! Today, thanks to a new command, you can get a set of information about the location of any element within your documents.
4D v17 introduces ORDA, a major evolution in 4D which is opening a world of new possibilities for 4D developers. One of the benefits of using ORDA is related to record locking, because ORDA offers a choice between optimistic and pessimistic locking. After having introduced the ORDA locking mechanisms, we continue the ORDA series so you can discover how to work efficiently with optimistic locking with ORDA.
Since 4D v16 R4, it’s been possible to create tables by programming in your 4D Write Pro documents. Styling the whole table or just certain cells could be done during the creation of the document, but maybe you also want to manage your tables afterwards. Now, it’s easy to manipulate tables in an existing document, to change the border style or color, to change the font size or make it bold, etc.
4D Write Pro programming is highly based on “ranges“. After paragraph ranges and picture ranges, 4D v17 introduces a new type of range: table ranges, returned by a new command: WP Create table range. Styling tables is now simple with this new command and new type of range!
4D Write Pro keeps offering more and more programming capabilities! Let’s say you want to programmatically change the style of a table, paragraph, or image in an existing 4D Write Pro document. With 4D v17, it’s possible! Now you can access any element or part of a document, by programming. These parts, called elements, will be returned either as a collection thanks to the WP Get elements function, or as a single element with WP Get element by ID function.
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