0
185
ViewsGet specific values from object when mapping through nested object
I want to return an array with specific values of _time & _value. The function that I made is as followed:
getMachineData(data) {
console.log(data)
const result = data.map((innerArray) => {
console.log(typeof innerArray)
console.log(innerArray)
// Map over the inner array
return innerArray.map((item) => {
console.log(item)
return ({
time: item._time,
value: item._value
});
});
});
console.log(result);
};
But in this code the last console.log is never hit.
The innerArray data is as followed:
{ "result": "_result", "table": 0, "_start": "2021-01-06T14:35:53Z", "_stop": "2022-01-06T14:35:53Z", "_time": "2021-10-11T10:58:30Z", "_value": 0, "_field": "approved", "_measurement": "oee-data", "end_time_str": "2021-10-11T10:59:00Z", "machine": "almo", "start_time_str": "2021-10-11T10:58:30Z" }
The output:
·
Juan Pablo Isaza
2 answers
Answer question0
Your innerArray is not not an Array but an Object. You can not map over an Object like innerArray.map... which will probably throw an error.
·
Juan Pablo Isaza
Report
0
innerArray is an Object, so dont have to iterate. Just access the value directly. Replace below code
return innerArray.map((item) => {
console.log(item)
return ({
time: item._time,
value: item._value
});
});
with
return {
time: innerArray._time,
value: innerArray._value
};
The optimized code will look like
getMachineData(data) {
const result = data.map(({_time, _value}) => ({time: _time, value:_value }));
console.log(result);
};
·
Juan Pablo Isaza
Report
Answer question