Convert nested array in swift to single dimensional array

Question

I have a structure like [[[ ]]] which I want to convert to [].

E.g. [ [ [ \"Hi\" ] ] ] into [ \"Hi\" ]

How

Answer 1

you can use join as

let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let newArray = Array(numbers.joined().joined())
print(newArray)//[1,2,3,4,5,6,7,8,9]]