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Posted At Mon, Nov 13, 2023 8:21 AM

JavaScript Typed Arrays

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Table of Contents

1. Introduction to Typed Arrays
- Definition and Purpose
- Advantages in Low-Level Operations
2. Available Typed Array Types
- Int8Array
- Uint8Array
- Int16Array
- Uint16Array
- Int32Array
- Uint32Array
- Float32Array
- Float64Array
3. Creating Typed Arrays
- Using Constructors
- Creating Typed Arrays from Existing Arrays or Buffers
4. Working with Typed Arrays
- Accessing and Modifying Elements
- Iterating Through Typed Arrays
- Common Operations

1. Introduction to Typed Arrays

- Definition and Purpose

Typed Arrays in JavaScript are specialized array-like objects that provide a way to work with binary data in a more controlled manner. They are designed for scenarios where low-level manipulation of binary data is required, such as in graphics processing, network protocols, or file I/O.

- Advantages in Low-Level Operations

- Efficient Memory Usage:
Typed Arrays have a fixed size and are optimized for memory usage.
- Element-wise Operations: They allow performing operations on the binary data at the element level, offering a more granular approach.

2. Available Typed Array Types

JavaScript provides several Typed Array types, each catering to specific data types and scenarios:

- Int8Array: 8-bit two's complement signed integer.
- Uint8Array: 8-bit unsigned integer.
- Int16Array: 16-bit two's complement signed integer.
- Uint16Array: 16-bit unsigned integer.
- Int32Array: 32-bit two's complement signed integer.
- Uint32Array: 32-bit unsigned integer.
- Float32Array: 32-bit IEEE floating-point number.
- Float64Array: 64-bit IEEE floating-point number.

3. Creating Typed Arrays

- Using Constructors

let intArray = new Int32Array(4); // Creates a 4-element Int32Array

- Creating Typed Arrays from Existing Arrays or Buffers

let sourceArray = [1, 2, 3, 4];
let intArray = new Int32Array(sourceArray);

4. Working with Typed Arrays

- Accessing and Modifying Elements

let intArray = new Int32Array([1, 2, 3, 4]);
let firstElement = intArray[0];
intArray[1] = 10;

- Iterating Through Typed Arrays

let intArray = new Int32Array([1, 2, 3, 4]);
intArray.forEach(element => {
    console.log(element);
});

- Common Operations

- Subarray Slicing:
Creating a new Typed Array by extracting a portion of an existing one.
- Buffer Views: Creating multiple views into the same underlying binary data.

In conclusion, JavaScript Typed Arrays provide a powerful mechanism for handling binary data, offering efficiency and precision in low-level operations. Understanding their types and usage is essential for developers working on applications with specific performance requirements.

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