sv-strutils/strutils.js

Simple string utilities (reverse, capitalize, vowels, palindrome)

// stringutils.js
function reverse(str) {
  return String(str).split("").reverse().join("");
}

function capitalize(str) {
  const s = String(str);
  return s ? s[0].toUpperCase() + s.slice(1).toLowerCase() : s;
}

function countVowels(str) {
  const m = String(str).match(/[aeiou]/gi);
  return m ? m.length : 0;
}

function isPalindrome(str) {
  const cleaned = String(str).toLowerCase().replace(/[^a-z0-9]/g, "");
  return cleaned === cleaned.split("").reverse().join("");
}

module.exports = { reverse, capitalize, countVowels, isPalindrome };