An array is an ordered collection of elements of the same type, and they are used for pretty much anything that requires storing things in a certain order, such as the contents of lists in apps. It works like similar types in other languages.
Here are some of the most common operations on arrays:
Create an array:
let a = [0,1,2,3,4] // array literal
Join two arrays:
var b = a + [5,6]
Repeat a value:
let c = Array(repeating: 4.1, count: 3)
Create an array from any sequence (a String is a Sequence of Character):
var d = Array("The ☀ and 🌙 ")Add values to the end of an array:
b.append(10) // append one element
Append an entire array:
b += a b.append(contentsOf: a) // append a sequence
Get the length of an array:
b.count
Iterate over all elements:
for nr in b { // do something with 'nr' }
Here are their abilities, represented by some of the protocols they conform to:
