Swift Academy · Lesson

Converting Slices Back to Arrays

Materialize a slice into a standalone array.

Slices Are Not Arrays

An ArraySlice is a distinct type from Array. Many APIs expect a concrete Array, so you often need to convert.

let original = [1, 2, 3, 4, 5]
let slice = original[1..<4]
print(type(of: slice))

Wrap a slice in the Array(...) initializer to make a fresh, independent array with copied elements and zero-based indices.

let original = [10, 20, 30, 40, 50]
let slice = original[2..<5]
let array = Array(slice)
print(array)
print(type(of: array))