ha1f

/// パスから末尾の拡張子を取得する
function getFileExtension(path) {
  let splitted= url.split(".");
  return splitted[splitted.length - 1];
}

/// Google Driveのルート直下の指定の名前の
/// フォルダを作成または取得する
function getTargetFolder(folderName) {
  let rootFolder = DriveApp.getRootFolder();

ha1f

import Foundation

final class WeakObject<T: AnyObject> {
    weak var _object: T?

    init(_ object: T) {
        _object = object
    }
}

ha1f

private func _hexString<I: BinaryInteger>(_ value: I) -> String {
    "0x" + String(value, radix: 16)
}

extension Character {
    func hexRepresentation() -> String {
        unicodeScalars
            .map { _hexString($0.value) }
            .joined(separator: ", ")
    }

ha1f

extension AVAsset {
    private func _generator(size: CGSize) -> AVAssetImageGenerator {
        let generator = AVAssetImageGenerator(asset: self)
        generator.maximumSize = size
        generator.appliesPreferredTrackTransform = true
        return generator
    }

    func extractUIImageAsync(size: CGSize) -> Single<UIImage?> {
        let generator = _generator(size: size)

ha1f

public extension KeyedDecodingContainerProtocol {
    func decode<T: Decodable>(forKey key: Key) throws -> T {
        try decode(T.self, forKey: key)
    }

    func decodeSafe<T: Decodable>(forKey key: Key, defaultValue: T) -> T {
        (try? decode(T.self, forKey: key)) ?? defaultValue
    }
}

ha1f

import Foundation

public protocol EmptyInitializable {
    init()
}
extension Int: EmptyInitializable {}
extension String: EmptyInitializable {}
extension Array: EmptyInitializable {}
extension Bool: EmptyInitializable {}

ha1f

//
//  UIKit+lerp.swift
//  ha1f
//

extension CGRect {
    /// 線形補間した中間矩形を返す
    /// - parameter otherRect: 目指す先の矩形
    /// - parameter rate: 0-1の間の値。0なら自分と、1ならotherRectと同じ。
    func lerp(_ otherRect: CGRect, rate: CGFloat) -> CGRect {

ha1f

import UIKIt

class CopyableLabel: UILabel {
    override init(frame: CGRect) {
        super.init(frame: frame)
        _commonInit()
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)

ha1f

extension Reactive where Base: UIImagePickerController {
    static func createAndPresent(from parent: UIViewController?, animated: Bool = true, configureImagePicker: @escaping (UIImagePickerController) throws -> Void = { x in }) -> Observable<[UIImagePickerController.InfoKey: Any]> {
        return Observable.create { [weak parent] observer in
            let imagePicker = UIImagePickerController()
            let dismissDisposable = imagePicker.rx
                .didCancel
                .subscribe(onNext: { [weak imagePicker] _ in
                    guard let imagePicker = imagePicker else {
                        return
                    }

ha1f

/// JavaのStringBuilder的なインターフェースを想定
final class URLBuilder {
    private var components: URLComponents

    init?(string: String) {
        guard let components = URLComponents(string: string) else {
            return nil
        }
        self.components = components
    }