Exercise 2: Paldinromes

Directions

Given a string, return true if the string is a palindrome or false if it is not. Palindromes are strings that form the same word if it is reversed. Do include spaces and punctuation in determining if the string is a palindrome.

Examples:

palindrome("abba") === true
  palindrome("abcdefg") === false

Solution

function palindrome(str) {
  return str === str.split("").reverse().join("");
}

Alternative Solution

Double comparison issue: compare last to first and first to last

function palindrome(str) {
  return str.split('').every((char, idx) => char === str[str.length -1 - idx]); // length is avail for arr too
}

palindrome("abba")

true

palindrome("abcdefg")

false