Check for palindromes with Javascript

A palindrome is a word, phrase, number, or other sequence of characters which reads the same backward or forward, For example the term race car is a palindrome because it spells out the same term whether it is written forward or if it is written backward.

Another example of a palindrome is the phrase Madam I'm Adam because it's the same both forwards and backwards.

Input : String
Output : return true if its a palindrome and fales if its not.

Implementation #

function isPalindrome(word) {
  var charArray = word.toLowerCase().split("");
  var validChar = "abcdefghijklmnopqrstuvwxyz";
  var originalWord = "";
  var reversedWord = "";

  charArray.forEach((char) => {
    if (validChar.indexOf(char) > -1) {
      reversedWord = char + reversedWord;
      originalWord = originalWord + char;
    }
  });

  if (reversedWord == originalWord) return true;
  else return false;
}

Main Point: Using array and string manipulation

The code is availalbe here : https://repl.it/@ahmd1/Palindrome

There are so many ways to check for palindromes for examples using regular expression so feel free to submit your solution with any programming language.

Credits #

Photo by Erol Ahmed

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