我有一个数据集
$scope.mydata = [{
"Block_Devices": {
"bdev0": {
"Backend_Device_Path": "/dev/ram1",
"Capacity": "16777216",
"Bytes_Written": 1577,
"timestamp": "4365093970",
"IO_Operations": 17757,
"Guest_Device_Name": "vdb",
"Bytes_Read": 17793,
"Guest_IP_Address": "192.168.26.88"
},
"bdev1": {
"Backend_Device_Path": "/dev/ram2",
"Capacity": "16777216",
"Bytes_Written": 1975,
"timestamp": "9365093970",
"IO_Operations": 21380,
"Guest_Device_Name": "vdb",
"Bytes_Read": 20424,
"Guest_IP_Address": "192.168.26.100"
}
},
"Number of Devices": 2
}]
我想从这个json创建一个数组,比如
devices = ['bdev0', 'bdev1']
当我尝试
时 $scope.mydata.Block_Devices
它给了我整个json对象,但我只想要对象的名称,即bdev0和bdev1,我怎么能得到它?
答案 0 :(得分:1)
试试这个:
var devices = [];
for (var key in $scope.mydata[0].Block_Devices) {
devices.push(key)
}
答案 1 :(得分:1)
以防万一ES5解决方案
devices = Object.keys($scope.mydata[0].Block_Devices)
答案 2 :(得分:0)
您必须遍历对象属性才能将其归档:
TwitterTopologyCreator topology = new TwitterTopologyCreator();
topology.setSpout("kafka-spout1", new KafkaSpout(spoutConf1), 1);
topology.setSpout("kafka-spout2", new KafkaSpout(spoutConf2), 1);
topology.createTopology(topologyName, clientName);
hasOwnProperty调用对于跳过原型属性很重要,如果你确定没有,你可以跳过它。