convert json array to dictionary in swift 5 code example
Example 1: swift convert array to dictionary
extension Array {
public func toDictionary<Key: Hashable>(with selectKey: (Element) -> Key) -> [Key:Element] {
var dict = [Key:Element]()
for element in self {
dict[selectKey(element)] = element
}
return dict
}
}
struct Person {
var name: String
var surname: String
var identifier: String
}
let arr = [Person(name: "John", surname: "Doe", identifier: "JOD"),
Person(name: "Jane", surname: "Doe", identifier: "JAD")]
let dict = arr.toDictionary { $0.identifier }
print(dict)
Example 2: swift convert dictionary to json
let dic = ["2": "B", "1": "A", "3": "C"]
let encoder = JSONEncoder()
if let jsonData = try? encoder.encode(dic) {
if let jsonString = String(data: jsonData, encoding: .utf8) {
print(jsonString)
}
}