Javascript Check For Palindrome (spaces & Punctuation Included)

Trying to check for palindromes. I've checked other answers but none included punctuation & spaces. 'never odd or even' and 'A man, a plan, a canal. Panama' Should return true

Solution 1:

I think you have an error in your RegEx. If you want to remove the spaces, you don't need that \s. Try changing:

str.replace(/[^\w\s]|_/g, "")

With

str.replace(/[^\w]|_/g, "")

Solution 2:

Use instead:

str.replace(/\W/g, "")

Which will replace any non-word char by empty string.

Solution 3:

You can try with a simpler regex which simply replaces any character that is not in the alphabet?

functionpalindrome(str) {
  if(str.replace(/[^a-zA-Z]/g, "").toLowerCase() === str.replace(/[^a-zA-Z]/g, "").toLowerCase().split("").reverse().join("")){
    returntrue;
  } else {
    returnfalse;
  }
}

Solution 4:

This is similar to the above but reformatted:

function palindrome(str) {
    let regex = /[^a-zA-Z]/g;
    return str.replace(regex, '').toLowerCase() === str.replace(regex, '').toLowerCase().split('').reverse().join('');
}