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## Reverse an Array

Does anyone how to reverse an array?

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Super User

Hi there,

You can use an Excel script to do that - that would be the most efficient way.  Paul Murana walks through that here, in his "Array Reverse" script.

https://www.tachytelic.net/2021/03/power-automate-sort-array/

If you're not into that, this works too:

1. Create a new array (I called mine arrBackwards)
2. Use an "Apply to Each" and point it at your original collection.

3. Get the last item in the Forwards array:  last(variables('arrForwards'))

4. Add it to the Backwards array.

5. Remove the last item from the Forwards array. take(variables('arrForwards'),add(length(variables('arrForwards')),-1))
6. Set the Forwards array to the previous compose so we reference that going forward.

That did the trick.

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3 REPLIES 3
Super User

Hi there,

You can use an Excel script to do that - that would be the most efficient way.  Paul Murana walks through that here, in his "Array Reverse" script.

https://www.tachytelic.net/2021/03/power-automate-sort-array/

If you're not into that, this works too:

1. Create a new array (I called mine arrBackwards)
2. Use an "Apply to Each" and point it at your original collection.

3. Get the last item in the Forwards array:  last(variables('arrForwards'))

4. Add it to the Backwards array.

5. Remove the last item from the Forwards array. take(variables('arrForwards'),add(length(variables('arrForwards')),-1))
6. Set the Forwards array to the previous compose so we reference that going forward.

That did the trick.

# ______________________________________________________________

Did it contribute positively towards finding the final solution? Please give it a thumbs up.

I answer questions on the forum for 2-3 hours every Thursday!

Frequent Visitor

Regular Visitor

If anyone is still facing this issue, Power Automate now also has a reverse expression that you can use inside the compose function. See this blog for an explanation: https://www.inogic.com/blog/2022/10/new-function-expressions-in-power-automate-flow/

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