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Combine elements of an array with a field in common

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Posted on by FP-22010922-0

Hello everyone,

I have following array (they are basically elements of a list in share point) in which some elements have the same "Revision":

{

"Revision": 123,

"Comment": first comment

{

"Revision": 123,

"Comment": second comment

{

"Revision": 456,

"Comment": first comment

{

"Revision": 789,

"Comment": first comment

}...

and so on.

Is it possible to combine all the elements having the same "Revision" by merging the comments? The deisred output, considering that two element feature the revision "123" would be:

{

"Revision": 123,

"Comment": first comment second comment

{

"Revision": 456,

"Comment": first comment

{

"Revision": 789,

"Comment": first comment

}

Thanks in advance

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Building flows

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lbendlin 8,474 Super User 2025 Season 2 on at

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Combine elements of an array with a field in common

I am sure there are more elegant ways

1. Select unique Revisions

2. For each revision find and join all comments

3. Stuff the results into the output array

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FP-22010922-0 6 on at

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Combine elements of an array with a field in common

Hello lbendlin,

thank you very much for your answer, however I am not able to reproduce your example, because some parts of the flow are missing in your screenshot (such as "Filter array").

Would you please be so kind to upload the flow?

Thanks you

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Chriddle 8,416 Super User 2025 Season 2 on at

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Combine elements of an array with a field in common

From

union( xpath( xml(json(concat('{"Root":{"Item":', outputs('Compose'), '}}'))), '//Revision/text()' ), json('[]') )

Revision

item()

Comment

join( xpath( xml(json(concat('{"Root":{"Item":', outputs('Compose'), '}}'))), concat('//Item[Revision="', item(), '"]/Comment/text()') ), ' ' )

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FP-22010922-0 6 on at

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Combine elements of an array with a field in common

@Chriddle thank you very much for your proposed solution!!

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