المصفوفات والمجموعات

var fruits = ["تفاح", "موز"]
fruits.append("برتقال")
print(fruits[0])           // تفاح
print(fruits.count)        // 3
fruits.remove(at: 0)
fruits.insert("عنب", at: 0)
print(fruits.contains("موز"))   // true

let nums = [1, 2, 3, 4]
let doubled = nums.map { $0 * 2 }       // [2,4,6,8]
let evens = nums.filter { $0 % 2 == 0 } // [2,4]
let total = nums.reduce(0, +)           // 10

var unique: Set<Int> = [1, 2, 2, 3]   // {1,2,3}
unique.insert(4)
print(unique.contains(2))             // true

let a: Set = [1, 2, 3]
let b: Set = [2, 3, 4]
print(a.intersection(b))   // {2,3}
print(a.union(b))          // {1,2,3,4}