HonmaMasaru

import Foundation

// XORShiftのRandomNumberGenerator
// 参考: https://ja.wikipedia.org/wiki/Xorshift

struct XORShift: RandomNumberGenerator {
    private var y: UInt64

    init(seed: UInt64 = 2463534242) {
        y = seed > 0 ? seed : 2463534242

HonmaMasaru

import SwiftUI
import PlaygroundSupport

struct NowPlayingIcon: View {
    var body: some View {
        ZStack(alignment: .bottom) {
            HStack(spacing: 12) {
                ForEach(0..<5) { i in
                    Bar(delay: Double(i) * 0.2) // (1.0秒 / 5.0本)
                }

HonmaMasaru

// times.swift.gyb
%{
# https://yoshinblog.com/blogs/426E9F5D-8CA4-49A7-AC6D-54AC22429B46
# curl "https://raw.githubusercontent.com/apple/swift/master/utils/gyb.py" -o "gyb.py"
# ./gyb.py times.swift.gyb -o times.swift --line-directive=
}%
% for sign in ['','U']:
    % for intType in ['','8','16','32','64']:

/// Extension that adds a few additional functionalities to ${sign}Int${intType}

HonmaMasaru

import UIKit
import PlaygroundSupport

final class ViewController: UIViewController {
    private let colors: [UIColor] = [.cyan, .magenta, .yellow]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        let img = makeTile(colors: colors, size: 50)!
            .resizableImage(withCapInsets: .zero, resizingMode: .tile)

HonmaMasaru

import SwiftUI
import PlaygroundSupport

/// ネットから画像を取得
struct NetImage: View {
    @ObservedObject private var observer: Observer
    
    init(url: URL) {
        observer = Observer(url)
    }

HonmaMasaru

// ↓ こっちの方が良い
// https://gist.github.com/sumitokamoi/22b8f30c2c1a3ef93cb1f03d4a7e8066

func divide<Element>(array: Array<Element>, partition: Int) -> [Array<Element>] {
    var r: [Array<Element>] = []
    stride(from: 0, to: array.count, by: partition).forEach { i in
        let e = i + partition < array.count ? i + partition : array.count
        r.append(Array(array[i..<e]))
    }
    return r

HonmaMasaru

import Foundation

// エラトステネスの篩
// https://ja.wikipedia.org/?curid=147374

// パターン1
func sieve1(_ max: Int) -> [Int] {
    let max = max + 1
    

HonmaMasaru

import UIKit
import UserNotifications

extension UNNotificationAttachment {
    static func build(identifier: String, image: UIImage?, options: [AnyHashable: Any]? = nil) -> UNNotificationAttachment? {
        guard let data = image?.pngData() else { return nil }
        let url = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("\(identifier).png")
        do { try data.write(to: url) } catch { return nil }
        return try? UNNotificationAttachment(identifier: identifier, url: url, options: options)
    }

HonmaMasaru

import UIKit

protocol SegueKey: RawRepresentable where RawValue == String {}

extension UIViewController {
    func performSegue<Key: SegueKey>(withIdentifier identifier: Key, sender: Any?) {
        performSegue(withIdentifier: identifier.rawValue, sender: sender)
    }
}

HonmaMasaru

import UIKit

protocol ConfigBase {
    associatedtype Key: RawRepresentable, CaseIterable where Key.RawValue == String

    var userDefaults: UserDefaults { get }

    func set(_ value: Any?, forKey key: Key)
    func set(_ value: Float, forKey key: Key)
    func set(_ value: Double, forKey key: Key)