js建筑者模式

http://www.manongjc.com/article/42740.html

// //书籍建造者类
// class BookBuilder {
//   constructor() {
//     this.name = "";
//     this.author = "";
//     this.price = 0;
//     this.category = "";
//     Object.keys(this).forEach((key) => {
//       const withName = `with${key.substring(0, 1).toUpperCase()}${key.substring(
//         1
//       )}`;
//       this[withName] = (value) => {
//         this[key] = value;
//         return this;
//       };
//     });
//   }

//   //调用建造者
//   build() {
//     const keysNoWithers = Object.keys(this).filter(
//       (key) => typeof this[key] !== "function"
//     );
//     return keysNoWithers.reduce((returnValue, key) => {
//       console.log("returnValue", returnValue);
//       return {
//         ...returnValue,
//         [key]: this[key],
//       };
//     }, {});
//   }
// }
class BaseBuilder {
  init() {
    Object.keys(this).forEach((key) => {
      const withName = `with${key.substring(0, 1).toUpperCase()}${key.substring(
        1
      )}`;
      this[withName] = (value) => {
        this[key] = value;
        return this;
      };
    });
  }
  build() {
    const keysNoWithers = Object.keys(this).filter(
      (key) => typeof this[key] !== "function"
    );

    return keysNoWithers.reduce((returnValue, key) => {
      return {
        ...returnValue,
        [key]: this[key],
      };
    }, {});
  }
}

//子类1: 书籍建造者类
class BookBuilder extends BaseBuilder {
  constructor() {
    super();
    this.name = "";
    this.author = "";
    this.price = 0;
    this.category = "";

    super.init();
  }
}

//子类2: 印刷厂建造者类
class printHouseBuilder extends BaseBuilder {
  constructor() {
    super();

    this.name = "";
    this.location = "";
    this.quality = "";

    super.init();
  }
}

//调用印刷厂建造类
const printHouse = new printHouseBuilder()
  .withName("新华印刷厂")
  .withLocation("北京海淀区")
  .withQuality("A")
  .build();
const book = new BookBuilder()
  .withName("高效能人士的七个习惯")
  .withAuthor("史蒂芬·柯维")
  .withPrice(51)
  .withCategory("励志")
  .build();
console.log("book", book);

https://www.cnblogs.com/10manongit/p/12794935.html