cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
Prem_ddsl
Advocate II
Advocate II

Dynamic Loops in PowerApps

PowerApps does not have a loop construct so it's not possible to iterate through a set of values and then perform some action within the loop.
However, PowerApps does have a ForAll function which evaluates a formula for all records of a table.
ForAll can be nested, so we can use a nested pattern to generate collections with quite a large number of rows.
For example, a collection with 10 rows allows us to generate a new collection with 100 rows.
The following code snippet allows us to build a collection with a specified number of rows.
=======================
//define a base collection from which you will generate your target collection.
ClearCollect(colBase, [1,2,3,4,5,6,7,8,9,10]);
//specify target rowcount
Set(vMaxRows, 57);
//setup collections to be used as inner and outer counters
ClearCollect(colOuter, colBase);
ClearCollect(colInner, colBase);
Set(vOuterMax, CountRows(colOuter));
//generate target collection
ForAll(colOuter, ForAll(colInner, Collect(colTarget, {RowId: colInner[@Value] + (vOuterMax * (colOuter[@Value] - 1)), Inner: colInner[@Value], Outer: colOuter[@Value]})));
RemoveIf(colTarget, RowId > vMaxRows)
======================
To visualise the above, insert a Data Table into your app and set it's datasource to colTarget and show the columns RowId, Inner, Outer.
 
I hope the community finds the above useful.
Regards,
Prem_ddsl
10 REPLIES 10
pwak
Regular Visitor

How about generate a number from min to max. Say from 5 to 8=[5,6,7,8]. In VB just For x=min to max: next x. In power apps I use timer and many counter. What is the better work around for this.

 

Thanks,

Noel

Helpful resources

Announcements
Power Platform Conf 2022 768x460.jpg

Join us for Microsoft Power Platform Conference

The first Microsoft-sponsored Power Platform Conference is coming in September. 100+ speakers, 150+ sessions, and what's new and next for Power Platform.

365 EduCon 768x460.png

Microsoft 365 EduCon

Join us for two optional days of workshops and a 3-day conference, you can choose from over 130 sessions in multiple tracks and 25 workshops.

Users online (4,109)