Question

151

How to add key values pair in object in JAVASCRIPT?

rated 0 times [ 158] [ 7] / answers: 1 / hits: 19015 / 4 Years ago, tue, october 6, 2020, 12:00:00

how can I push keys and values in an empty object?

You are provided with an array, possibleIterable. Using a for loop, build out the object divByThree so that each key is an element of possibleIterable that is divisible by three. The value of each key should be the array index at which that key can be found in possibleIterable.

const possibleIterable = [4, 3, 9, 6, 23];

const divByThree = {};

// ADD CODE HERE

for (let i =0 ; i < possibleIterable.length; i++)

  {

    if (possibleIterable[i] % 3 === 0)

   {

      // ADD CODE HERE!

         

      }

  }

console.log(divByThree)

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nathanaelzechariahl

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2 Years ago

answered 4 Years ago keyonna · Accepted Answer

You cannot push on to an object. You have to specify the key and value like so:

Literally

divByThree.key = value

Note, in the above example, key is the literal key name, and so you would access it like:

divByThree.key

divByThree['key']  // note the quotes around key

Dynamically

If you want to create a dynamic key based on a js variable for example, you can do:

const keyName = 'myKey';

divByThree[keyName] = value;

To access the value, you can do:

divByThree[keyName];  // no quotes. Value of keyName variable

divByThree['myKey'];

divByThree.myKey;