实现JavaScript一个函数

Question

实现一个函数 函数有一个参数
参数是 "sensorname": 的值
返回值是 "value" 的值

{
    "flag": "00",
    "msg": "成功",
    "list": [
        {
            "devicenumber": "72E47A44B6894788",
            "devicename": "室外温度补偿",
            "id": "146217",
            "sensorname": "x1",
            "sensorstyle": "1",
            "point": "1",
            "until": "个",
            "calc": "☆",
            "value": "-25",
            "valuetime": "2023-11-03 08:58:03",
            "devicegroup": "",
            "describe": "",
            "xieyi": "HTTP",
            "controlstyle": "1",
            "address": "",
            "area": "室外温度补偿",
            "storagetime": "1800",
            "systemname": "AI人工智能系统",
            "online": "0"
        },
        {
            "devicenumber": "72E47A44B6894788",
            "devicename": "室外温度补偿",
            "id": "146218",
            "sensorname": "x2",
            "sensorstyle": "1",
            "point": "1",
            "until": "个",
            "calc": "☆",
            "value": "-15",
            "valuetime": "2023-11-03 08:58:03",
            "devicegroup": "",
            "describe": "",
            "xieyi": "HTTP",
            "controlstyle": "1",
            "address": "",
            "area": "室外温度补偿",
            "storagetime": "1800",
            "systemname": "AI人工智能系统",
            "online": "0"
        },
        {
            "devicenumber": "72E47A44B6894788",
            "devicename": "室外温度补偿",
            "id": "146219",
            "sensorname": "x3",
            "sensorstyle": "1",
            "point": "1",
            "until": "个",
            "calc": "☆",
            "value": "-10",
            "valuetime": "2021-11-30T21:37:09",
            "devicegroup": "",
            "describe": "",
            "xieyi": "HTTP",
            "controlstyle": "1",
            "address": "",
            "area": "室外温度补偿",
            "storagetime": "1800",
            "systemname": "AI人工智能系统",
            "online": "0"
        },
        {
            "devicenumber": "72E47A44B6894788",
            "devicename": "室外温度补偿",
            "id": "146220",
            "sensorname": "x4",
            "sensorstyle": "1",
            "point": "1",
            "until": "个",
            "calc": "☆",
            "value": "-5",
            "valuetime": "2021-11-30T21:37:05",
            "devicegroup": "",
            "describe": "",
            "xieyi": "HTTP",
            "controlstyle": "1",
            "address": "",
            "area": "室外温度补偿",
            "storagetime": "1800",
            "systemname": "AI人工智能系统",
            "online": "0"
        }
    ],
    "sensorlist": []
}

Answer 1

function getSensorValue(sensorname) {
  const data = {
    "flag": "00",
    "msg": "成功",
    "list": [
      {
        "devicenumber": "72E47A44B6894788",
        "devicename": "室外温度补偿",
        "id": "146217",
        "sensorname": "x1",
        "sensorstyle": "1",
        "point": "1",
        "until": "个",
        "calc": "☆",
        "value": "-25",
        "valuetime": "2023-11-03 08:58:03",
        "devicegroup": "",
        "describe": "",
        "xieyi": "HTTP",
        "controlstyle": "1",
        "address": "",
        "area": "室外温度补偿",
        "storagetime": "1800",
        "systemname": "AI人工智能系统",
        "online": "0"
      },
      {
        "devicenumber": "72E47A44B6894788",
        "devicename": "室外温度补偿",
        "id": "146218",
        "sensorname": "x2",
        "sensorstyle": "1",
        "point": "1",
        "until": "个",
        "calc": "☆",
        "value": "-15",
        "valuetime": "2023-11-03 08:58:03",
        "devicegroup": "",
        "describe": "",
        "xieyi": "HTTP",
        "controlstyle": "1",
        "address": "",
        "area": "室外温度补偿",
        "storagetime": "1800",
        "systemname": "AI人工智能系统",
        "online": "0"
      },
      {
        "devicenumber": "72E47A44B6894788",
        "devicename": "室外温度补偿",
        "id": "146219",
        "sensorname": "x3",
        "sensorstyle": "1",
        "point": "1",
        "until": "个",
        "calc": "☆",
        "value": "-10",
        "valuetime": "2021-11-30T21:37:09",
        "devicegroup": "",
        "describe": "",
        "xieyi": "HTTP",
        "controlstyle": "1",
        "address": "",
        "area": "室外温度补偿",
        "storagetime": "1800",
        "systemname": "AI人工智能系统",
        "online": "0"
      },
      {
        "devicenumber": "72E47A44B6894788",
        "devicename": "室外温度补偿",
        "id": "146220",
        "sensorname": "x4",
        "sensorstyle": "1",
        "point": "1",
        "until": "个",
        "calc": "☆",
        "value": "-5",
        "valuetime": "2021-11-30T21:37:05",
        "devicegroup": "",
        "describe": "",
        "xieyi": "HTTP",
        "controlstyle": "1",
        "address": "",
        "area": "室外温度补偿",
        "storagetime": "1800",
        "systemname": "AI人工智能系统",
        "online": "0"
      }
    ],
    "sensorlist": []
  };

  const sensor = data.list.find(item => item.sensorname === sensorname);
  if (sensor) {
    return sensor.value;
  } else {
    return null;
  }
}

// 示例用法

console.log("x1: value is",getSensorValue("x1")); 
console.log("x2: value is",getSensorValue("x2")); 
console.log("x3: value is",getSensorValue("x3")); 
console.log("x4: value is",getSensorValue("x4"));