Snippets in JavaScript: Alternative Alphabet

example.js

/**
 * Generate a range of characters based on strings
 *
 * @param string startCharacter
 * @param string endCharacter
 * @return string[]
 */
function generateCharacterRange(startCharacter, endCharacter) {
	let letters = [];

	for (let i = startCharacter.charCodeAt(0), l = endCharacter.charCodeAt(0); i <= l; i++) {
		letters.push(String.fromCharCode(i));
	}
	
	return letters;
}

const lowercaseLetters = generateCharacterRange('a', 'z');
const uppercaseLetters = generateCharacterRange('A', 'Z');
const numbers = generateCharacterRange('0', '9');

console.log('Lowercase Letters', lowercaseLetters);
console.log('Uppercase Letters', uppercaseLetters);
console.log('Numbers', numbers);