Question 273350 in Javascript Question posted in
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Get key of a specific value in a JavaScript object

I made this simple code which outputs random values in the array. I hope to get the associated key using the fetched randomizeValues

let characterJobList = {
  'Jack': 'Fighter',
  'Elaine': 'Healer',
  'Swift': 'Spy',
  'Teddy': 'Smith'
}

const arrayLength = Object.keys(characterJobList).length
const randomizeValues = characterJobList[Object.keys(characterJobList)[Math.floor(Math.random() * arrayLength)]]

console.log(randomizeValues)
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2

Answers


  1. 0

    Store the chosen key in a separate variable before accessing the value:

    let characterJobList = {
    'Jack': 'Fighter',
    'Elaine': 'Healer',
    'Swift': 'Spy',
    'Teddy': 'Smith'
}

const allKeys = Object.keys(characterJobList);
const randomKey = allKeys[Math.floor(Math.random() * allKeys.length)];
const randomValue = characterJobList[randomKey];

console.log(randomKey, randomValue);
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  2. 0

    Object.entries is a useful array.

    Here I use destructuring to get the key and value in one statement

    let characterJobList = {
    'Jack': 'Fighter',
    'Elaine': 'Healer',
    'Swift': 'Spy',
    'Teddy': 'Smith'
}

const allEntries = Object.entries(characterJobList);
const [randomKey,randomValue] = allEntries[Math.floor(Math.random() * allEntries.length)];

console.log(randomKey, randomValue);
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