Anonymous Quiz
3%
! (force unwrap)
64%
? (optional chaining)
33%
?? (nil coalescing)
1%
-> (arrow)
👍4
Anonymous Quiz
9%
Инкапсуляция
7%
Наследование
29%
Полиморфизм
55%
Протоколы
👀6👍1
Anonymous Quiz
22%
asyncAfter
3%
performSelector
73%
DispatchQueue.global().async
1%
NSTimer.scheduledTimer
👀2
Anonymous Quiz
70%
try-catch
16%
throws
6%
Error handling
9%
Optional
👍2
Anonymous Quiz
52%
defer
31%
guard
10%
finally
8%
ensure
👍1
Anonymous Quiz
79%
Observer
15%
Delegate
2%
Singleton
3%
Factory
👍3
Anonymous Quiz
49%
protocol class
8%
class only
34%
class
9%
typealias
👍1
Anonymous Quiz
16%
iterate(over:)
1%
generate()
63%
lazy()
21%
sequence(first:next:)
👍3
Anonymous Quiz
39%
func getFirstString(strings: [String]) -> String { return strings.first }
6%
function getFirstString([String]) -> String { return strings[0] }
6%
func getFirstString(strings: Array<String>) -> String { return strings.first }
49%
func getFirstString(strings: [String]) -> String { return strings[0] }
👍2👀2
Anonymous Quiz
28%
Методика для прерывания выполнения функции, если значение `nil`
28%
Способ вызова свойства, метода или субскрипта на `nil` без вызова ошибки
40%
Последовательность условных операторов для проверки `nil`
5%
Техника для уменьшения использования памяти при работе с переменными
👍4
Anonymous Quiz
51%
sort()
45%
sorted()
3%
order()
2%
arrange()
Anonymous Quiz
77%
["key1": "value1", "key2": "value2"]
15%
Dictionary("key1": "value1", "key2": "value2")
4%
{["key1": "value1", "key2": "value2"]}
5%
(key1: "value1", key2: "value2")
Anonymous Quiz
3%
`?`
95%
`!`
2%
`*`
0%
`&`
Anonymous Quiz
69%
enum Name: String { case A = "Apple", B = "Banana" }
19%
enum Name { case A = "Apple", case B = "Banana" }
5%
enum Name(String) { case A = "Apple", case B = "Banana" }
6%
type enum Name: String { case A = "Apple", case B = "Banana" }
Anonymous Quiz
1%
protocol MyProtocol { mandatory func myMethod() }
14%
protocol MyProtocol { required func myMethod() }
85%
protocol MyProtocol { func myMethod() }
0%
define protocol MyProtocol { func myMethod() }
Anonymous Quiz
2%
let array = [Int]()
96%
var array = [Int]()
0%
const array = [Int]()
2%
array<int> = []
Anonymous Quiz
42%
`?`
4%
`!`
52%
`??`
2%
`&`
Anonymous Quiz
97%
print()
2%
println()
1%
echo()
1%
console.log()
Anonymous Quiz
91%
final class
4%
static class
4%
closed class
1%
sealed class
Anonymous Quiz
93%
DispatchQueue.main.async {}
4%
DispatchQueue.global().async {}
1%
2%
Async.runOnMain {}