/**
* @function XORCipher
* @description - Encrypt using an XOR cipher
* The XOR cipher is a type of additive cipher.
* Each character is bitwise XORed with the key.
* We loop through the input string, XORing each
* character with the key.
* @param {string} str - string to be encrypted
* @param {number} key - key for encryption
* @return {string} encrypted string
*/
export const XORCipher = (str: string, key: number): string =>
str.replace(/./g, (char: string) =>
String.fromCharCode(char.charCodeAt(0) ^ key)
)