tinyCaesar: A Caesar Cipher Implementation

Parameters

• t: Input text to be encrypted or decrypted
• n: Shift value (positive for encryption, negative for decryption)

Explanation

The tinyCaesar function uses:

• Regular expressions (/[a-zA-Z]/g) to match all letters
• A callback function (c => ...) to transform each matched letter
• ASCII code manipulation (charCodeAt(0), String.fromCharCode(...)) for shifting
• Modular arithmetic (% 26) to wrap around the alphabet

Example Usage

console.log(tinyCaesar("J", 3)); // Output: "M"

console.log(tinyCaesar("M", -3)); // Output: "J"

Key Points

• Concise and efficient Caesar cipher implementation
• Uses regular expressions and callback functions
• Suitable for simple encryption/decryption tasks, but not recommended for sensitive data due to relative weakness