decastring

DecaString

A lightweight JavaScript library for common string manipulations. DecaString provides simple yet powerful methods for reversing, randomizing, case manipulation, and capitalization of strings.

Features

• 🔄 String reversal
• 🎲 Character randomization
• 🔡 Random case transformation
• 📝 First letter capitalization
• ✨ Zero dependencies
• 💪 TypeScript support
• ✅ Fully tested
• 📦 Lightweight (~1KB minified)

Installation

Using npm:

npm install decastring

Using yarn:

yarn add decastring

Usage

const DecaString = require('decastring');

// Or using ES modules
import DecaString from 'decastring';

const str = "HelloWorld";

// Reverse a string
console.log(DecaString.reverseString(str));
// Output: "dlroWolleH"

// Randomize character order
console.log(DecaString.randomizeString(str));
// Output: "lWroHlodle" (random order)

// Randomize character cases
console.log(DecaString.randomCaseString(str));
// Output: "hElLoWoRlD" (random case for each character)

// Capitalize first letter
console.log(DecaString.capitalizeString("hello world"));
// Output: "Hello world"

API Reference

DecaString.reverseString(s)

Reverses the given string.

Parameters:

• s (string): The string to reverse

Returns:

• (string): The reversed string

Example:

DecaString.reverseString("hello");  // Returns: "olleh"

DecaString.randomizeString(s)

Randomizes the order of characters in the given string.

Parameters:

• s (string): The string to randomize

Returns:

• (string): The randomized string

Example:

DecaString.randomizeString("hello");  // Returns: e.g., "lehol"

DecaString.randomCaseString(s)

Applies random casing to each character in the string.

Parameters:

• s (string): The string to randomize case

Returns:

• (string): The string with random case for each character

Example:

DecaString.randomCaseString("hello");  // Returns: e.g., "hElLo"

DecaString.capitalizeString(s)

Capitalizes the first character of the string and makes the rest lowercase.

Parameters:

• s (string): The string to capitalize

Returns:

• (string): The capitalized string

Example:

DecaString.capitalizeString("hello world");  // Returns: "Hello world"

Error Handling

All methods perform type checking and will throw a TypeError if the input is not a string:

try {
    DecaString.reverseString(123);  // Throws TypeError
} catch (error) {
    console.error(error.message);  // "Input must be a string"
}

TypeScript Support

DecaString includes TypeScript type definitions out of the box:

import DecaString from 'decastring';

const reversed: string = DecaString.reverseString("hello");

Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

• Fork the repository
• Create your feature branch (git checkout -b feature/AmazingFeature)
• Commit your changes (git commit -m 'Add some AmazingFeature')
• Push to the branch (git push origin feature/AmazingFeature)
• Open a Pull Request

Testing

npm test

License

This project is licensed under the MIT License - see the LICENSE file for details.

Author

Tom Tarpey

• Twitter: @DecaDoesRust
• GitHub: @decagondev

Acknowledgments

• Inspired by various string manipulation libraries
• Special thanks to all contributors

Changelog

1.0.0 (2024-11-01)

• Initial release
• Added core string manipulation methods
• Added TypeScript support