how do i use `mapto` plus `takeif` in chain, so th...

# announcements

[Syed Faraz]

how do i use mapto plus takeif in chain, so that only those which satisfy operation are mapped to an arraylist?

[wasyl]

You want to take only certain items from the collection, map them to other object, and put everything in an array list? In that case I think it’d be collection.filter { }.mapTo(arrayList()) { }

[tseisel]

collection.mapNotNullTo(arrayListOf()) { item ->
    item.transform().takeIf { it.satisfiesPredicate() }
}

[gildor]

Yes, Thibault was faster 🙂
mapNotNullTo is the way to do that, but only for non-nullable values