How can I convert an object to an array of key-value pairs in JavaScript?
Antek N

In JavaScript, you can convert an object to an array of key-value pairs using various methods. Here are a few approaches: 1. Object.entries(): - TheObject.entries() method returns an array of a given object's own enumerable property[key, value] pairs. - It allows you to convert an object into an array of key-value pairs.

1
2
3
4

   const obj = { name: 'John', age: 25 };
   const keyValuePairs = Object.entries(obj);

In this example,Object.entries(obj) converts theobj object into an array of key-value pairs, and the resulting array (keyValuePairs) would be[['name', 'John'], ['age', 25]]. 2. Object.keys() and Array.prototype.map(): - TheObject.keys() method returns an array of a given object's own enumerable property names. - By combining it with theArray.prototype.map() method, you can create an array of key-value pairs.

1
2
3
4

   const obj = { name: 'John', age: 25 };
   const keyValuePairs = Object.keys(obj).map(key => [key, obj[key]]);

In this example,Object.keys(obj) retrieves the keys of theobj object, and.map(key => [key, obj[key]]) creates an array of key-value pairs by mapping each key to an array containing the key and its corresponding value. 3. for...in loop: - You can use afor...in loop to iterate over the object's enumerable properties and create an array of key-value pairs.

1
2
3
4
5
6
7
8
9

   const obj = { name: 'John', age: 25 };
   const keyValuePairs = [];
   for (let key in obj) {
     if (obj.hasOwnProperty(key)) {
       keyValuePairs.push([key, obj[key]]);
     }
   }

In this example, thefor...in loop iterates over the object's properties, andif (obj.hasOwnProperty(key)) ensures that only the object's own properties are considered. The loop then pushes each key-value pair as an array into thekeyValuePairs array. These approaches allow you to convert an object to an array of key-value pairs, providing different formats for further processing or manipulation. Choose the method that best suits your use case and consider the specific requirements of your application.

Similar Questions