Easy Reference Comparison of Objects & Collections
Objects have become an essential part of the 4D language and of Qodly. But when you declare a variable of this type, you define a reference. So, how ...
July 18, 2024
1 min read
Collections
Sync Several Collections with this new Function
4D offers powerful features to work with object collections. For example, you can create a collection of cities with their associated countries and co...
October 18, 2023
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Meet the Improved Distinct Function
Retrieving the list of unique data elements is always helpful when manipulating data. In some cases, retrieving the number of occurrences of each valu...
April 26, 2023
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New Handy Functions for Collections!
The functions associated with collections were introduced with 4D v16 R6 and have evolved with the possibility to use formulas for some of them, like ...
April 25, 2023
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Automatic Row Heights in Collection Based List Boxes
List boxes are the most versatile and customizable form objects. Automatic row heights were already possible for array-based list boxes. With the arri...
January 15, 2023
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The Use of Formulas in Collections & Callback Commands
When you use collections with a member method that needs a callback method, many of you have asked us for a more straightforward way. You asked; we d...
July 16, 2022
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Use collections and lists within forms objects
Collections are increasingly used in 4D programming. Starting with 4D v19, you can use them to define the content of some interface objects, including...
April 23, 2021
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ORDA: Easy looping with a new 4D tag
You have probably already used a For each...End for each loop to work with ORDA entity selections or with collections. Its use is simple and straight ...
April 22, 2021
1 min read
ORDA – Better list box row selecting
You've probably used the LISTBOX SELECT ROW command many times, looping through each entity in order to select the rows for an entity selection. 4D v...
May 11, 2020
1 min read
Use collections to write and read in 4D View Pro
If you need to read or write hundreds of different values or formulas, you can do it faster, easier, and at the same time by using collections. New co...
July 25, 2019
1 min read