Filter array by indices

Question

I have an array of elements. I also have an IndexSet that specifies which indices of the array need to be extracted into a new array. E.g.:

let array = [\"su         


        

Answer 1

You can use enumerated, filter and map like this

let result = array
    .enumerated()
    .filter { indexSet.contains($0.offset) }
    .map { $0.element }