How can I empty an array variable in Azure Logic Apps?

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KaizheZheng-1489 asked Apr 30, '22 BrunoLucas-9843 edited May 2, '22

How can I empty an array variable in Azure Logic Apps?

Hello,

I have create a For Each Loop in Azure Logic Apps. Before, I initialized an array variable and I want to write different infos into it with each iteration. For each new iteration I would like to clear the array variable. For example we have 3 iterations. For the first one I want to get ["red", "blue", "green"], emptying array variable, next ["yellow", "blue", "red"], emptying array variable again and for third ["blue","yellow","orange"].

I have tried to use Set variable in the For each activity with the following values:

array('')
array([])

but each time I get a result like this ["", "yellow" "blue", "red"], ["","blue","yellow","orange"]

Any suggestions how I can clear the array variable without the "" at the start?

Thanks and best regards

azure-logic-apps

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Answer 1 · 2022-05-02T02:25:14.41Z

BrunoLucas-9843 answered May 2, '22 BrunoLucas-9843 edited May 2, '22

Hi, you may not need to do that depending how you arrange the flow, but if you want to try clearing an array, click on the "set value" of "set variable" and switch to "expression", type null and click ok. Another aproach is creating a second array variable, keep it empty and assign the original array to the value of the second array: https://powerusers.microsoft.com/t5/Building-Flows/Clear-array-variable-in-a-flow/m-p/82097#M8153

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