#29 JavaScript Bangla Tutorial | Array Filter

JavaScript Bangla Tutorial | Array Filter

Unlock the power of the filter() method in JavaScript with this hands-on tutorial! The filter() method allows you to create new arrays by selecting specific elements that meet a condition, making it an essential tool for working with data in modern JavaScript.

In this video, you’ll learn how to use filter() effectively, understand its syntax, and see real-world examples that showcase its versatility. Whether you're filtering numbers, strings, or objects, this guide will help you master the filter() method step by step.

What You’ll Learn in This Video:
✅ What is the filter() Method?

Overview of filter() and how it works.
Understanding how filter() creates a new array based on a condition.
✅ Syntax and Parameters:

Syntax of filter(callback, thisArg).
How the callback function works with the current element, index, and array.
The role of the optional thisArg parameter.
✅ Practical Examples:

Example 1: Filtering even numbers from an array.
Example 2: Extracting strings longer than a specific length.
Example 3: Filtering objects in an array (e.g., getting products under a specific price).
✅ Real-World Applications:

Filtering active users in a user list.
Extracting tasks marked as "completed" in a to-do list.
Filtering search results based on user input.
✅ Best Practices:

Using arrow functions to simplify callback syntax.
Combining filter() with other methods like map() and reduce() for advanced operations.

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