How to assign value of one variable to name of another? [JavaScript, Vue.js]

Question

I have 2 JSON arrays

"feeds":[
  {
     "created_at":"2021-11-28T00:11:38Z",
     "entry_id":17901,
     "field1":"16.40000",
     "field2":"45.50000",
     "field3":"16.06250",
     "field4":"5.20000",
     "field5":"49.79300",
     "field7":"1",
     "field8":"390267909"
  }
]

and

 "measurements":[
   {
      "user_id":1,
      "measurements_id":1,
      "fieldId":1,
      "name":"Unutrašnja temperatura vazduha",
      "unit":"°C",
      "url":"inner-temp.png"
   }]

So in my code when I want to access value of field1 I do myField=feeds.field1 and then value of myField is 16.4000. But now I need to add those values dynamically, depending on the fieldId property value from second JSON array measurements.

Basically, I need something like: myField='feeds.field'+measurements.fieldId and then again myField should be 16.4000.

Is the JSON data formatted like that? Or is it truncated? If it is like that, parsing it will throw an error. — evolutionxbox
– evolutionxbox, Commented Nov 28, 2021 at 1:21
Consider using the square bracket notation. feed[`${field}${measurements.fieldId}`] — evolutionxbox
– evolutionxbox, Commented Nov 28, 2021 at 1:26
Does this answer your question? Dynamically access object property using variable — evolutionxbox
– evolutionxbox, Commented Nov 28, 2021 at 1:26

StereoBucket · Accepted Answer · 2021-11-28 01:25:05Z

4

You can use bracket notation to access object members like so:

myField = feeds['field' + measurements.fieldId];

You can read more about it on MDN

answered Nov 28, 2021 at 1:25

StereoBucket

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