js将map转成数组

//根据资源的ID去查找
        this.classArray = [];
        for(var c in this.comboData.classId){
            this.classArray.push({
              text:this.comboData.classId[c],
              value:c
            });
        }

comboData:{
           classId:{1: "课程教案", 2: "作业练习", 4: "课件", 5: "测试试题", 6: "实验实训", 7: "其他资源", 8: "视频资源", 9: "课程导学", 10: "教学内容", 11: "教学资料", 12: "教学进度", 13: "预习资料"}
           }