如何在Angular2中没有键名的情况下循环JSON？

Question

这是我的代码片段：我知道我从我的webservice获得了一个结果，因为它返回了200 ok。 但我无法循环以拉出数据元素。

this.cityService.searchByRegion(formData)
        .subscribe((resultsReturned) => {

            console.log("ResultsReturned :" + resultsReturned);
            resultsReturned.forEach((city) => {
              var newSearchResult = new SearchResult(city);
              this.results.push(newSearchResult);
            });

这是返回的JSON：

[ {
  "region_id" : "8",
  "time" : "2015-01-16T08:31:40",
  "bus_count" : "200",
  "speed" : "15.68",
  "number_of_reads" : "3412"
}
, {
  "region_id" : "8",
  "time" : "2015-01-15T08:31:39",
  "bus_count" : "200",
  "speed" : "15.68",
  "number_of_reads" : "3535"
}
, {
  "region_id" : "8",
  "time" : "2015-01-14T08:40:47",
  "bus_count" : "200",
  "speed" : "14.32",
  "number_of_reads" : "3463"
}]

如何使用forEach返回解析出的JSON数据？ 我尝试了returnResults.json ...但是刚刚返回了一个对象：object

我对Angular2很新，所以任何帮助都会受到赞赏。