How to useObject.assign() in Javascript
In this approach uses Object.assign() to add key-value pairs with numerical keys to an empty object, creating an object with properties assigned to corresponding values.
Example: In this example, we will use Object.assign() method which is the part of the Object superclass. This method will copy all the values and will append those values in the object as key-value pair(s).
let object = {};
let firstKey = 0;
let firstKeyValue = "w3wiki";
let secondKey = 1;
let secondKeyValue = "Hello JavaScript";
let thirdKey = 2;
let thirdKeyValue = "Hello React";
Object.assign(object, { [firstKey]: firstKeyValue });
Object.assign(object, { [secondKey]: secondKeyValue });
Object.assign(object, { [thirdKey]: thirdKeyValue });
console.log(object);
Output
{ '0': 'w3wiki', '1': 'Hello JavaScript', '2': 'Hello React' }
How to create an object from the given key-value pairs using JavaScript ?
In this article, we will learn to create an object from the given key-value pairs using JavaScript.Key-value pair: Unique identifier (key) associated with its corresponding value; fundamental for data organization and retrieval in programming. here we have some common approaches.
We will explore the process of creating objects from key-value pairs in JavaScript. Key-value pairs are fundamental in organizing and retrieving data efficiently within programs. We’ll discuss various common approaches to achieve this goal, empowering you with the knowledge to handle key-value data effectively in your JavaScript projects. Let’s see and discover these approaches together.
Following are some approaches to achieve the mentioned target.
Table of Content
- Approach 1: Using Numerical Keys and Values in JavaScript
- Approach 2: Using Object.assign()
- Approach 3: Using for loop
- Approach 4: Using a custom function
- Approach 5: Using the Map object
- Approach 6: Using Array.prototype.reduce()
We will explore all the above methods along with their basic implementation with the help of examples.
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