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Split - Accessing specific row (by index)

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Posted on by JohnP

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I have a comma separated list which I split into a table with the Split() function. But I'm not certain how I can access a row directly by index? Something like this would be logical (where CurrentIndex is a variable somewhere else in the screen):

Split(AxisXLabels; ",")[CurrentIndex]

Any advice?

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CarlosFigueira Microsoft Employee on at

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Currently there is no function to access directly an item by a specific index - you can consider creating a new feature request in the PowerApps Ideas board for this.

Notice that you already can do that, using a pair of FirstN and Last functions: to access the N-th item in a table, you can use the following expression:
Last(FirstN(table, N))
In your case, you can get the value as
Last(FirstN(Split(AxisXLabels; ","); CurrentIndex))

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JohnP 543 on at

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Thanks for the workaround 🙂 I did a LookUp to work around this, but your idea is better/shorter for my use.

Actually someone already proposed an index based approach to collection/tables and it was declined:

https://powerusers.microsoft.com/t5/PowerApps-Ideas/Collection-indexer-Collection-index/idi-p/2591

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NoumanQ 35 on at

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Thanks for the solution. Seeminly complex problem with a simple solution. Thanks

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kbirstein1 130 on at

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I don't understand this, can someone give a complete example? I have a collection that has one column and four rows. The column is called "ID", so it looks like this:

ID
2
8
10
15

I would like to access the value in the third row, 10. However, this syntax:

Last(FirstN(colLabelChangeIDs,2))

does not work. The error says:
"The property expects text values. But this rule produces incompatible record values".

I have seen this error a lot and understand that it has to do with records vs. single values.

However, the description of "FirstN" is so laughably inadequate in the Microsoft "documentation" it's impossible to understand how it works.

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CarlosFigueira Microsoft Employee on at

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If you have that expression in a Label, then you need to access the ID property of your collection:

Last(FirstN(colLabelChangeIDs,2)).ID

Notice that this will show you the value in the second row, not the third one (as the first element has index 1). To show the third ID from your collection (i.e., the number 10), you'd use this expression:

Last(FirstN(colLabelChangeIDs, 3)).ID

Hope this helps.

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MichelH 401 on at

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I notice this doesn't work for me.
I tried to pull appart a string "69, 85, 101, 0.8" to feed the parts into the RGBA funtion to color a label alike.

To get something usable, I had to add the .Result and use the Value function, even though the strings comming out of the Split seemed appropriate input.

RGBA(
Value( First( Split( FocusBorder.Text,",") ).Result ),
Value( Last( FirstN( Split( FocusBorder.Text,","), 2) ).Result ),
Value( Last( FirstN( Split( FocusBorder.Text,","), 3) ).Result ),
Value( Last( Split( FocusBorder.Text,",") ).Result )
)

Thanks for the Last( FirstN( array , N) ) trick!!

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CalfordMath 131 on at

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Brilliant workaround! @CarlosFigueira Thanks. Works for my needs.
Last(FirstN(table, N))

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jayprakash 12 on at

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I have done By this Logic
Select(Parent);RemoveIf(ProductList, Index = Gallery2.Selected.Index);

Clear(collection2);
ForAll(ProductList,
Collect(collection2,
{
Index: CountRows(collection2)+1,
Comments: Comments,
SalesPrice: SalesPrice,
Discount: Discount,
Quantity: Quantity,
Height: Height,
Width: Width,
Color: Color,
ProfileSet: ProfileSet,
Product: Product,
Group: Group
}
)
);
Clear(ProductList);
ForAll(collection2,
Collect(ProductList,
{
Index: Index,
Comments: Comments,
SalesPrice: SalesPrice,
Discount: Discount,
Quantity: Quantity,
Height: Height,
Width: Width,
Color: Color,
ProfileSet: ProfileSet,
Product: Product,
Group: Group
}
)
);
Set(ValueToIncrement, CountRows(ProductList));
wrote: -Jayprakash Birla

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IvoYanWL 8 on at

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Now there's the Index function:
Index(Split(myString, delimiter), 1) - returns a row/record at index 1;
Index(Split(myString, delimiter), 1).Value - returns the value/substring of the row/record at index 1;

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