mono0926

import UIKit

extension UIColor {
    class var theme: UIColor { return #colorLiteral(red: 0.4274509804, green: 0.7568627451, blue: 0.6196078431, alpha: 1) }
    class var notification: UIColor { return #colorLiteral(red: 1, green: 0.4666666667, blue: 0, alpha: 1) }
    class var negative: UIColor { return #colorLiteral(red: 0.9843137255, green: 0.4588235294, blue: 0.4588235294, alpha: 1) }
    class var darkBackground: UIColor { return #colorLiteral(red: 0.1725490196, green: 0.1725490196, blue: 0.1725490196, alpha: 1) }
    class var darkLightBackground: UIColor { return #colorLiteral(red: 0.3401621282, green: 0.3401621282, blue: 0.3401621282, alpha: 1) }
}

mono0926

import UIKit

extension UIColor {
    class var theme: UIColor { return #colorLiteral(red: 0.4274509804, green: 0.7568627451, blue: 0.6196078431, alpha: 1) }
    
    // 別解1(推奨)
    struct MyApp {
        static var theme: UIColor { return #colorLiteral(red: 0.4274509804, green: 0.7568627451, blue: 0.6196078431, alpha: 1) }
    }
    

mono0926

import UIKit

extension UIColor {
    struct JoinUs {
        private init() {}
        /** #6DC19E */
        static let theme = #colorLiteral(red: 0.4274509804, green: 0.7568627451, blue: 0.6196078431, alpha: 1)
        /** #FF7700 */
        static let notification = #colorLiteral(red: 1, green: 0.4666666667, blue: 0, alpha: 1)
        /** #FB7575 */

mono0926

extension String.CharacterView {
    subscript(sequentialAccess i: Int) -> Character {
        let index = self.index(startIndex, offsetBy: i)
        return self[index]
    }
    subscript(sequentialAccess range: Range<Int>) -> String.CharacterView {
        let start = self.index(startIndex, offsetBy: range.lowerBound)
        let end = self.index(start, offsetBy: range.count)
        return self[start..<end]
    }

mono0926

extension String.CharacterView {
    func read(_ i: Int) -> Character {
        let index = self.index(startIndex, offsetBy: i)
        return self[index]
    }
    func read(_ range: Range<Int>) -> String.CharacterView {
        let start = self.index(startIndex, offsetBy: range.lowerBound)
        let end = self.index(start, offsetBy: range.count)
        return self[start..<end]
    }

mono0926

let s = "Café du 🌍"

let si = s.startIndex
let ci = s.characters.startIndex
si == ci // true

let si2 = s.index(si, offsetBy: 3)
let ci2 = s.characters.index(ci, offsetBy: 3)
si2 == ci2 // true

mono0926

extension String: BidirectionalCollection, RangeReplaceableCollection {}

extension String {
    
    public mutating func removeFirst(_ n: Int) {
        characters.removeFirst(n)
    }
    
    public mutating func removeLast(_ n: Int) {
        characters.removeLast(n)

mono0926

// まずString.CharacterViewにメソッド定義
extension String.CharacterView {
    
public subscript(sequentialAccess range: Range<Int>) -> String.CharacterView {
        let lower = range.lowerBound
        let startIndex = index(self.startIndex, offsetBy: lower)
        let endIndex = index(startIndex, offsetBy: range.count)
        return self[startIndex..<endIndex]
    }
    

mono0926

extension String {
    var capitalizingFirstLetter: String {
        return String(characters.prefix(1)).capitalized + String(characters.dropFirst())
    }
}

enum MyEnum: String {
    case fooBar
    
    var rawValue: String { return String(describing: self).capitalizingFirstLetter  }

mono0926

{
    "profiles": [
        {
            "devices": [
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "is_pointing_device": false,
                        "product_id": 272,
                        "vendor_id": 2131