How to return the index of null items in a list

[ASSILI_KARIM]

Hi , how can I extract the index of null items from one list , and after that , use this index to return items from other list ?

[Einar_Raknes]

Hello,
You need to replace the nulls for the getAllIndicesOf node to work:

[T_Pover]

Another option:

[ASSILI_KARIM]

Thank you @Einar_Raknes , problem solved