What is the process of extracting a value from an array of objects based on another parameter?

Given the array below which contains objects with nested arrays, my goal is to retrieve the value 'AUS Eastern Standard Time' when 'Australia/Melbourne' is passed to the array.

Although I attempted to use the code 

var winTimeZone = arr.find(tz => tz.utc && tz.utc.includes('Australia/Melbourne));

The Servicenow platform does not support the find method. I would appreciate any alternative solutions. Thank you

var arr =[
    {
        "isdst": false,
        "offset": "09:30:00",
        "text": "(UTC+09:30) Darwin",
        "utc": [
            "Australia/North",
            "Australia/Darwin"
        ],
        "value": "AUS Central Standard Time"
    },

    {
        "isdst": true,
        "offset": "10:00:00",
        "text": "(UTC+10:00) Canberra, Melbourne, Sydney",
        "utc": [
            "Australia/Sydney",
            "Australia/Melbourne",
            "Australia/Hobart",
            "Australia/Victoria",
            "Australia/ACT",
            "Australia/Canberra",
            "Australia/NSW",
            "Australia/Tasmania",
            "Australia/Currie"
        ],
        "value": "AUS Eastern Standard Time"
    }]
javascriptarraysservicenow

Answer №1

I am currently experiencing issues with your code, but I find it surprising that the Platform teams are restricting such a basic feature of JavaScript. Perhaps it's time to consider finding a new company that values innovation and development.

Here is a revised version of your code to try:

var arr =[
    {
        "isdst": false,
        "offset": "09:30:00",
        "text": "(UTC+09:30) Darwin",
        "utc": [
            "Australia/North",
            "Australia/Darwin"
        ],
        "value": "AUS Central Standard Time"
    },

    {
        "isdst": true,
        "offset": "10:00:00",
        "text": "(UTC+10:00) Canberra, Melbourne, Sydney",
        "utc": [
            "Australia/Sydney",
            "Australia/Melbourne",
            "Australia/Hobart",
            "Australia/Victoria",
            "Australia/ACT",
            "Australia/Canberra",
            "Australia/NSW",
            "Australia/Tasmania",
            "Australia/Currie"
        ],
        "value": "AUS Eastern Standard Time"
    }]
    
    const utcValueForCity = (utcCity) => 
      arr.reduce((acum, current)=>
        acum || (current.utc.includes(utcCity)?current.value:undefined)
    , undefined)
    
    console.log(utcValueForCity("Australia/Melbourne"))

Answer №2

This particular piece of code utilizes outdated syntax that is likely to still be compatible:

var locations = [
  {
    "isDaylightSavingTime": false,
    "timeOffset": "09:30:00",
    "locationText": "(UTC+09:30) Darwin",
    "relatedUTC": [
      "Australia/North",
      "Australia/Darwin"
    ],
    "timeZoneValue": "AUS Central Standard Time"
  },
  {
    "isDaylightSavingTime": true,
    "timeOffset": "10:00:00",
    "locationText": "(UTC+10:00) Canberra, Melbourne, Sydney",
    "relatedUTC": [
      "Australia/Sydney",
      "Australia/Melbourne",
      "Australia/Hobart",
      "Australia/Victoria",
      "Australia/ACT",
      "Australia/Canberra",
      "Australia/NSW",
      "Australia/Tasmania",
      "Australia/Currie"
    ],
    "timeZoneValue": "AUS Eastern Standard Time"
  }
];

var winTimeZone;
for (var ind = 0; ind < locations.length; ind++) {
  var tz = locations[ind];
  for (var locInd = 0; locInd < tz.relatedUTC.length; locInd++) {
    if (tz.relatedUTC.indexOf("Australia/Melbourne") > -1) {
      winTimeZone = tz.timeZoneValue;
    }
  }
}
console.log("winTimeZone: " + winTimeZone);

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