json转化成Map数据结构，Map转Array

    //定义Map
    moreInfoList = new Map();
    moreInfoArray = [{ key: '', value: [] }];
    //jsonData是json类型的数据，下面代码中的this.beInfo是项目中api返回的内容
    const jsonData = this.beInfo;
    const infoMap = new Map();
    for (const key in jsonData) {
      if (jsonData.hasOwnProperty(key)) {
        infoMap.set(key, jsonData[key]);
      }
    }
    // filter the info whose properties is not null
    infoMap.forEach((value, key) => {
      if (MORE_INFO.includes(key) && value.properties.length > 0) {
        // put the result in a new Map
        this.moreInfoList.set(key, value.properties);
      }
    });
    // change to array
    this.moreInfoArray = Array.from(this.moreInfoList.entries()).map(([key, value]) => ({ key, value }));