YutoKashiwagi

abstract class Product {
  abstract use: () => void
}

abstract class Factory {
  create = (owner: string): Product => {
    const product = this.createProduct(owner)

    this.registerProduct(product)

YutoKashiwagi

abstract class AbstractDisplay {
  abstract open: () => void
  abstract print: () => void
  abstract close: () => void

  display = (): void => {
    this.open()

    for (let index = 0; index < 4; index++) {
      this.print()

YutoKashiwagi

interface IPrint {
  printWeak: () => void
  printStrong: () => void
}

class Banner {
  private text: string

  constructor(text: string) {
    this.text = text

YutoKashiwagi

interface IAggregate<T> {
  iterator: () => T
}

interface IIterator<T> {
  hasNext: () => boolean;
  next: () => T;
}

class Book {

YutoKashiwagi

authenticate
平文パスワードを渡すと、ハッシュ化されたパスワードと一致するかを確かめ、偽であればfalse,真であればオブジェクトを返す

def authenticate(request, &login_procedure)
  if has_basic_credentials?(request)
    login_procedure.call(*user_name_and_password(request))
  end
end

create:オブジェクトの作成と保存を同時に行い、オブジェクトを返す