javascript looping over data and recreating a data structure

December 30, 2021

If I have data like this:

{
"zone_temps" : {
   "VAV1": "read 12345:2 analogInput 2",
   "VAV2": "read 12345:2 analogInput 1",
   "VAV3": "read 12345:2 analogInput 1",
   "VAV4": "read 12345:2 analogInput 2",
   "VAV5": "read 12345:2 analogInput 1",
   "VAV6": "read 12345:2 analogInput 2",
   "VAV7": "read 12345:2 analogInput 1",   
   "VAV8": "read 12345:2 analogInput 1",   
   "VAV9": "read 12345:2 analogInput 2",   
   "VAV10": "read 12345:2 analogInput 1"}
}

Could someone give me a tip what a javascript function would look like looping over the data and recreating the data structure with same keys but the values would be in integer made from math.random()

Hopefully that makes sense, looking for a final output like this:

{
"zone_temps" : {
   "VAV1": "66",
   "VAV2": "88",
   "VAV3": "55",
   "VAV4": "66",
   "VAV5": "77",
   "VAV6": "67",
   "VAV7": "79",   
   "VAV8": "87",   
   "VAV9": "75",   
   "VAV10": "71"}
}

>Solution :

The English in the question is almost the answer in JS: Loop over the keys (map()) producing key-value pairs with random (Math.random()) values. Object.fromEntries() combines those pairs into a new object

const temps = {
  "VAV1": "read 12345:2 analogInput 2",
  "VAV2": "read 12345:2 analogInput 1",
  "VAV3": "read 12345:2 analogInput 1",
  "VAV4": "read 12345:2 analogInput 2",
  "VAV5": "read 12345:2 analogInput 1",
  "VAV6": "read 12345:2 analogInput 2",
  "VAV7": "read 12345:2 analogInput 1",
  "VAV8": "read 12345:2 analogInput 1",
  "VAV9": "read 12345:2 analogInput 2",
  "VAV10": "read 12345:2 analogInput 1"
}

const result = Object.fromEntries(Object.keys(temps).map(key => {
  return [ key, Math.round(Math.random()*100) ]
}))

console.log(result)