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Manolait
Asked: 2020-05-04 14:56:40 +0800 CST 2020-05-04 14:56:40 +0800 CST

Remove Object from an Array while traversing it

  • 772

I am working with NodeJS by retrieving the information from the REST API, I need to parse it, I have the following Object and I need to remove it from the array

sensor_type

the entire object that does not have the name equal to the attrName.

{
   "DatagreenhouseRecuperado":[
      {
         "_id":999,
         "medidas":[
            {
               "_id":"5cccb38f796936d12ef7586d",
               "marca":"Metos",
               "modelo":"Estacion",
               "fabricante":"Metos",
               "id_station":[
                  999
               ],
               "sensor_type":[
                  {
                     "name":44,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Temperatura",
                     "medida":"%",
                     "interfaz":""
                  },
                  {
                     "name":33,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  }
               ],
               "attrName":33,
               "attrValue":8888,
               "recvTimeTs":1588524826,
               "recvTime":"2020-05-03T18:53:46"
            }
         ],
         "count":1
      },
      {
         "_id":191,
         "medidas":[
            {
               "_id":"5cc85899a0160f16c50f4199",
               "marca":"Hortisis",
               "modelo":"Estacion",
               "fabricante":"Hortisis",
               "id_station":[
                  191,
                  457
               ],
               "sensor_type":[
                  {
                     "name":2,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  },
                  {
                     "name":3,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  }
               ],
               "attrName":3,
               "attrValue":2222,
               "recvTimeTs":1554134499,
               "recvTime":"2019-09-01T16:01:11.000Z"
            }
         ],
         "count":1
      },
      {
         "_id":457,
         "medidas":[
            {
               "_id":"5cc85899a0160f16c50f4199",
               "marca":"Hortisis",
               "modelo":"Estacion",
               "fabricante":"Hortisis",
               "id_station":[
                  191,
                  457
               ],
               "sensor_type":[
                  {
                     "name":2,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  },
                  {
                     "name":3,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  }
               ],
               "attrName":2,
               "attrValue":555,
               "recvTimeTs":1554134471,
               "recvTime":"2019-04-01T16:01:11.000Z"
            }
         ],
         "count":1
      }
   ]
}

For example, in the first case you would have to delete the object:

{
                         "name":44,
                         "type":"clima",
                         "place":"interior",
                         "img":"assets/img/hum.png",
                         "name_comun":"Temperatura",
                         "medida":"%",
                         "interfaz":""
                      }

since the attrName is 33.

I am not very sure how to do it, I have thought about going through the entire object and when it finds a name that is different from attrName, delete that object, but I don't know how to delete that object and not the name element.

Thanks greetings.

javascript

1 Answers

  1. Best Answer

    You can do it in the following way:

    const myArray = {
   "DatagreenhouseRecuperado":[
      {
         "_id":999,
         "medidas":[
            {
               "_id":"5cccb38f796936d12ef7586d",
               "marca":"Metos",
               "modelo":"Estacion",
               "fabricante":"Metos",
               "id_station":[
                  999
               ],
               "sensor_type":[
                  {
                     "name":44,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Temperatura",
                     "medida":"%",
                     "interfaz":""
                  },
                  {
                     "name":33,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  }
               ],
               "attrName":33,
               "attrValue":8888,
               "recvTimeTs":1588524826,
               "recvTime":"2020-05-03T18:53:46"
            }
         ],
         "count":1
      },
      {
         "_id":191,
         "medidas":[
            {
               "_id":"5cc85899a0160f16c50f4199",
               "marca":"Hortisis",
               "modelo":"Estacion",
               "fabricante":"Hortisis",
               "id_station":[
                  191,
                  457
               ],
               "sensor_type":[
                  {
                     "name":2,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  },
                  {
                     "name":3,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  }
               ],
               "attrName":3,
               "attrValue":2222,
               "recvTimeTs":1554134499,
               "recvTime":"2019-09-01T16:01:11.000Z"
            }
         ],
         "count":1
      },
      {
         "_id":457,
         "medidas":[
            {
               "_id":"5cc85899a0160f16c50f4199",
               "marca":"Hortisis",
               "modelo":"Estacion",
               "fabricante":"Hortisis",
               "id_station":[
                  191,
                  457
               ],
               "sensor_type":[
                  {
                     "name":2,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  },
                  {
                     "name":3,
                     "type":"clima",
                     "place":"interior",
                     "img":"assets/img/hum.png",
                     "name_comun":"Hum. Relativa",
                     "medida":"%",
                     "interfaz":""
                  }
               ],
               "attrName":2,
               "attrValue":555,
               "recvTimeTs":1554134471,
               "recvTime":"2019-04-01T16:01:11.000Z"
            }
         ],
         "count":1
      }
   ]
 };

 // primero itera DatagreenhouseRecuperado
 myArray.DatagreenhouseRecuperado.forEach(item =>
   // después iteramos item.medidas
   item.medidas.forEach(medida => {
     // después filtramos los medida.sensor_types dependiendo si 
     // sensor.name === medida.attrName
     medida.sensor_type = medida.sensor_type.filter(sensor =>
       sensor.name === medida.attrName
     )
   })
 )


 console.log(myArray.DatagreenhouseRecuperado);

    I hope this is what you need, regards!

    • 1