HarmonyOS 浅拷贝深拷贝

目前HarmonyOS没有直接进行深浅拷贝操作的api

1：使用三方库： https://ohpm.openharmony.cn/#/cn/detail/@wolfx%2Flodash

2：根据具体使用手写；

3：json.parse(json.stringify(obj)

具体demo如下：

import _ from '@wolfx/lodash';
export class AddForm {
  id: string = '';
  title: string = '';
}

@Entry
@Component
struct deepcopy {
  @State text: string = ""
  // loodash.cloneDeep(obj)深拷贝
  @State addForm: AddForm = { id: '小王', title: "100" }

  build() {
    Column({ space: 20 }) {
      Button("hello")
        .onClick(() => {
          let a: ESObject = deepCopy([1, 4, 7])
          console.log("yeyouzhi>>>" + a.toString())
        })
      Button("深拷贝")
        .onClick(() => {
          let form = _.cloneDeep(this.addForm)//使用cloneDeep方法实现深拷贝
          form.id = "改变";
          console.info(`原：${JSON.stringify(this.addForm)}-----拷贝${JSON.stringify(form)}`)
        })
      Button("浅拷贝")
        .onClick(() => {
          let form =this.addForm
          form.id = "改变";
          console.info(`原：${JSON.stringify(this.addForm)}-----拷贝${JSON.stringify(form)}`)
        })
    }
  }
}

function deepCopy(obj: ESObject): ESObject {
  if (typeof obj !== "object" || obj === null) {
    return obj;
  }
  let copy: ESObject;
  if (Array.isArray(obj)) {
    copy = [];
    for (let i = 0; i < obj.length; i++) {
      copy[i] = deepCopy(obj[i]);
    }
  } else {
    copy = {};
    for (let i = 0; i < obj.length(); i++) {
      let key: ESObject = obj[i];
      if (obj.hasOwnProperty(key)) {
        copy[key] = deepCopy(obj[key]);
      }
    }
  }
  return copy;
}
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