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Filter Array to get only odd rows.

Hi,

 

got Array of values, which I got from "Get Items" action. Now trying to filter my array by ID to get only rows odd ID.

 

I now there is "Filter Array" action but not sure how to configure in advanced mode...

 

Can I somehow use function ISEVEN? Or similiar?

 

Thank you.

Ales  

1 ACCEPTED SOLUTION

Accepted Solutions

Use the mod expression.

View solution in original post

8 REPLIES 8

Use the mod expression.

chico
Kudo Commander
Kudo Commander

this is marked resolved by using "mod"

but is there an example on how that is being used?

 

Hi @chico I am also looking for a more performant way to get it work with one single action called: Filter Array but I suck at prompting Bing🤖 to get a working expression so I am seeking from 💡tips for humans or PA aliens 👽. See screenshot from my current flow which uses an apply to each to filter every second item. 
What should go left branch?What should go left branch?

 



Just noticed that I hook up my questions to a bit different query. Here is the solution you are looking for @chico 

Even numbers are those numbers which are divisible by 2 and odd numbers which are not divisible by two.

So to get an array with IDs like 1,3,5,7...  you want to divide the ID by 2 and make sure there is a reminder. That's what the mod function will provide. It returns the remainder after a number is divided by a divisor.

Mod( Number, Divisor )

  • Number - Required. Number to divide.
  • Divisor - Required. Number to divide by.

In advance mode of you filter query
@equals(mod(item()?['ID'], 2), 1)

or you can use the opposite:
@not(equals(mod(item()?['ID'], 2), 0))
In regular way:

UsernameIsTaken_0-1688143610178.png

 



chico
Kudo Commander
Kudo Commander

this is niiiiice

takolota
Multi Super User
Multi Super User

@chico @UsernameIsTaken 

You could even set up a Select action to perform something on every other, every 5th, … every nth item in an array without any ID number column…

 

How to perform something on every n items

Select Action

From: Range(0, length(PreviousOutput))

Map: If(equals(0, mod(item(),n)),

DoStuffHere,

PreviousOutput[item()])

 

Can you go into more detail? Thank you~

kaijiayongshi_0-1701679651279.png


The red fonts 1 and 2 in the array are serial numbers. Here are 2 examples. I want to get the yellow information at the end of the serial number.

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