cooler333

import Foundation


var array = [1, 2, 3]

for number in array {
    print(number) // 1
    array = [4, 5, 6]
}
print(array) // 2

cooler333

import Foundation

class A: NSObject {
    weak var delegate: B?
}

class B: NSObject {
    weak var delegate: A?
}

cooler333

import Foundation

class Object { 
    let identifier: String
    init(identifier: String) {
        self.identifier = identifier
    }
}

protocol MutableCollectionProtocol {

cooler333

import Foundation

var count = 0
let group = DispatchGroup()

group.enter()
let thread1 = Thread {
    for _ in 0...9999 {
        count += 1
    }

cooler333

// Swift Playground example of Redux JS framework

import Foundation
import PlaygroundSupport


// MARK: Action

public protocol Action {
    associatedtype T = Any

cooler333

import Foundation
import PlaygroundSupport
import Combine

PlaygroundPage.current.needsIndefiniteExecution = true

let queue = DispatchQueue(label: "some")
_ = Future<String, Never> { promise in
    queue.asyncAfter(deadline: .now() + 2, execute: {
        print(Thread.current)

cooler333

import Foundation
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

// 1
struct User: Equatable {
    // 2
    struct Address: Equatable {