swift--collection type

Array

1. Create an array

var someints = [Int] () empty array

Someints = [] Empty

var threedoubles = Array (repeating: 0.0, Count: 3) arrays with default values

var shoppinglist: [String] = ["Eggs", "Milk"]

var arra = arrb + ARRC Creating an array is the addition of another two arrays

2.Array. Count

3.array. IsEmpty

4. Add elements

Array. Append("flour")

Array + = ["Baking Powder"]

5. Insert

Array. Insert("Maple syrup", at: 0)

6. Delete

Let a = array. Remove(at: 0)

7. Traverse

For item in array {

print(item)

}

for (index, value) in array. enumerated() {

Print("Item \(index + 1): \(value)")

}

swift--collection type