Object.assign()的替代方法

function assign(target: Record<string, Object>, …source: Object[]): Record<string, Object> { 
  for (const items of source) { 
  for (const key of Object.keys(items)) { 
  target[key] = Reflect.get(items, key) 
} 
} 
return target; 
}

// demo.ets 
import { Type, plainToClass } from 'class-transformer' 
import 'reflect-metadata' 
 
@Observed 
export class Description { 
  public str: string 
 
  constructor(str: string) { 
    this.str = str; 
  } 
} 
 
export class Person { 
  name: string = '' 
  age: number = 1 
  // 子属性实例化，适配三方库 
  @Type(() => Description) 
  description: Description = new Description('') 
 
  constructor(name: string, age: number, description: Description) { 
    this.name = name; 
    this.age = age; 
    this.description = description; 
  } 
 
  // 实现对象深拷贝方法 
  deepClone(): Person { 
    const str:Record<string, ESObject> =JSON.parse(JSON.stringify(this)) ; 
    const newPerson: Person = plainToClass(Person, str); 
    return newPerson; 
  } 
}