Swift Dictionaries
Swift Dictionaries
Dictionaries store key-value pairs.
Lookups are fast by key.
Use subscripting to read and write values.
Basics
Example
var ages: [String: Int] = ["Kai": 30]
ages["Elisabeth"] = 25
print(ages["Kai"] ?? 0)This example adds and reads values using dictionary subscripting.
Iterate Keys and Values
Loop through a dictionary to access keys and values.
Example
let ages = ["Kai": 30, "Elisabeth": 25]
for k in ages.keys.sorted() {
print("\(k): \(ages[k]!)")
}
