create object keys from array javascript code example

Example 1: javascript Convert an array of objects to a single object

const toObject = (arr, key) => arr.reduce((a, b) => ({ ...a, [b[key]]: b }), {});

// Example
toObject(
    [
        { id: '1', name: 'June', gender: 'Female' },
        { id: '2', name: 'Alex', gender: 'Male' },
        { id: '3', name: 'Harry', gender: 'Male' },
    ],
    'id'
);
/* 
{
    '1': { id: '1', name: 'June', gender: 'Female' },
    '2': { id: '2', name: 'Alex', gender: 'Male' },
    '3': { id: '3', name: 'Harry', gender: 'Male' },
}
*/

Example 2: javascript create array of object keys

// If this helps, don't forget to upvote so others can see

var apple = {
  'color': 'red',
  'editable': true,
  'weight': '100 grams',
};

var appleKeys = Object.keys(apple);
console.log(appleKeys);
// returns an array ['color', 'editable', 'weight']