Advance List management

[hitesh.hirani7APDE]

I am facing an issue that i have 2 lists with same number of elements one has all the rooms and another has true false value i want to create a list which can get all the true elements from another list and get back a new list in a same hierarchy.

Hope i was able to explain my issue

[staylor]

Feed the room list straight into the List Filter by BoolMask node input as shown below. This should get you what you want. You can flatten that list if needed.