javascript 循环 API 响应 json 数据

Question

我正在学习 javascript 尝试合并一些将进入 Node Red 功能块的代码。在下面的代码中，var data 是来自 API.

的 json 有效负载

var data = {
            "201201/tempUoTwoBalco": 
                {"value": 63.1199951171875, "route": "/vui/platforms/benshome/devices/201201/tempUoTwoBalco", "writable": false}, 
            "201201/tempUoThreeBalco": 
                {"value": 74.12999725341797, "route": "/vui/platforms/benshome/devices/201201/tempUoThreeBalco", "writable": false}, 
            "201201/Oat": 
                {"value": 89.99999237060547, "route": "/vui/platforms/benshome/devices/201201/Oat", "writable": false}, 
            "201201/RmTmpSpt": 
                {"value": 79.99999237060547, "route": "/vui/platforms/benshome/devices/201201/RmTmpSpt", "writable": true}, 
            "201201/RmTmp": 
                {"value": NaN, "route": "/vui/platforms/benshome/devices/201201/RmTmp", "writable": false}, 
            "201201/UhCmd": 
                {"value": 0, "route": "/vui/platforms/benshome/devices/201201/UhCmd", "writable": false}, 
            "201201/GlblHtgDsbl": 
                {"value": 0, "route": "/vui/platforms/benshome/devices/201201/GlblHtgDsbl", "writable": false}
};

console.log(data)


var supplyTemp = {};
var returnTemp = {};

sensor1 = "/vui/platforms/benshome/devices/201201/tempUoTwoBalco"
sensor2 = "/vui/platforms/benshome/devices/201201/tempUoThreeBalco"



for(var key in data){
    for(var key1 in data[key]){
        if(key1 === sensor1){
            console.log("sensor1 found "+ data[key][key1])
            // append float to supplyTemp?
        };

        if(key1 === sensor2){
            console.log("sensor2 found "+ data[key][key1])
            // append float to returnTemp?
        };
    };
};

如果 keys 在 json有效载荷？类似于 return [[supplyTemp,returnTemp]];

感谢任何 javascript 智慧，这是我想要获得的东西...

Answer 1

您需要 value 匹配 sensor1 和 sensor2 的属性分别存储在 supplyTemp 和 returnTemp 中？您可以使用 filter 过滤与提供的传感器匹配的值，然后将结果映射到获取值。这是一个例子：

var data = {
  "201201/tempUoTwoBalco":
    { "value": 63.1199951171875, "route": "/vui/platforms/benshome/devices/201201/tempUoTwoBalco", "writable": false },
  "201201/tempUoThreeBalco":
    { "value": 74.12999725341797, "route": "/vui/platforms/benshome/devices/201201/tempUoThreeBalco", "writable": false },
  "201201/Oat":
    { "value": 89.99999237060547, "route": "/vui/platforms/benshome/devices/201201/Oat", "writable": false },
  "201201/RmTmpSpt":
    { "value": 79.99999237060547, "route": "/vui/platforms/benshome/devices/201201/RmTmpSpt", "writable": true },
  "201201/RmTmp":
    { "value": NaN, "route": "/vui/platforms/benshome/devices/201201/RmTmp", "writable": false },
  "201201/UhCmd":
    { "value": 0, "route": "/vui/platforms/benshome/devices/201201/UhCmd", "writable": false },
  "201201/GlblHtgDsbl":
    { "value": 0, "route": "/vui/platforms/benshome/devices/201201/GlblHtgDsbl", "writable": false }
};

var supplyTemp = {};
var returnTemp = {};

let sensor1 = "/vui/platforms/benshome/devices/201201/tempUoTwoBalco"
let sensor2 = "/vui/platforms/benshome/devices/201201/tempUoThreeBalco"

supplyTemp = (Object.values(data).filter(element => element.route == sensor1).map(result => result.value))
returnTemp = (Object.values(data).filter(element => element.route == sensor2).map(result => result.value))

console.log([supplyTemp, returnTemp])

Answer 2

创建一个方法，其中 return 是您找到的对象的值。我的代码与@deepak 非常相似，除了它是 D.R.Y。（不要重复自己）。

我选择 .find() 而不是 .filter()，因为您的代码表明传感器是独一无二的。

查找将要么； return 匹配项或为空。
过滤器将 return 一个匹配项数组或一个空数组。

你可以选择你喜欢的那个。

let data = {
            "201201/tempUoTwoBalco": 
                {"value": 63.1199951171875, "route": "/vui/platforms/benshome/devices/201201/tempUoTwoBalco", "writable": false}, 
            "201201/tempUoThreeBalco": 
                {"value": 74.12999725341797, "route": "/vui/platforms/benshome/devices/201201/tempUoThreeBalco", "writable": false}, 
            "201201/Oat": 
                {"value": 89.99999237060547, "route": "/vui/platforms/benshome/devices/201201/Oat", "writable": false}, 
            "201201/RmTmpSpt": 
                {"value": 79.99999237060547, "route": "/vui/platforms/benshome/devices/201201/RmTmpSpt", "writable": true}, 
            "201201/RmTmp": 
                {"value": NaN, "route": "/vui/platforms/benshome/devices/201201/RmTmp", "writable": false}, 
            "201201/UhCmd": 
                {"value": 0, "route": "/vui/platforms/benshome/devices/201201/UhCmd", "writable": false}, 
            "201201/GlblHtgDsbl": 
                {"value": 0, "route": "/vui/platforms/benshome/devices/201201/GlblHtgDsbl", "writable": false}
};


let supplyTemp = {};
let returnTemp = {};

let sensor1 = "/vui/platforms/benshome/devices/201201/tempUoTwoBalco";
let sensor2 = "/vui/platforms/benshome/devices/201201/tempUoThreeBalco";

console.log(getTemp(sensor1, data));
// returns 63.1199951171875

console.log(getTemp(sensor1, data));
// returns 63.1199951171875

console.log(getTemp('', data));
// returns null

/**
* Get the sensor value for the given sensorRoute in the given array.
*/
function getTemp(sensorRoute, arr) { 
    let foundItem = Object.values(arr).find(element => element.route == sensorRoute);

  return foundItem ? foundItem.value : null;
}

javascript 循环 API 响应 json 数据

javascript loop through API response json data

javascript

node-red