FCC Bonfire - Check for Palindromes

palindrome.md

Task: Write a function which returns true if the given string is a palindrome. Otherwise, return false.

Pseudocode:

• Get the string value as a parameter
  • If the user has entered a string
    • Remove non-alphanumeric characters and make the string lowercase
    • Reverse the string
    • If the string is a palindrome
      • return the boolean value true
    • If the value is not a palindrome
      • return the boolean value false
  • If the given value is not a string
    • Ask the user to enter a string

Actual Code:

function palindrome(str) {
    if (typeof str === 'string') {
      // remove non-alphanumeric characters and make str lowercase
      var removeChar = str.replace(/[^A-Z0-9]/ig, "").toLowerCase();
      // reverse str variable
      var checkPalindrome = removeChar.split('').reverse().join('');

      // check if str is a palindrome
      if (removeChar === checkPalindrome ) {
        return true;
      } else {
        return false;
      }
    } else {
        return "Please enter a string";
    }
  }
palindrome("car"); // false