Palindrome

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

Solutions

JS

My Solution

function palindrome(str) {
    const lastIndex = str.length - 1
    const midPoint = Math.floor(lastIndex / 2);

  for (let i = 0; i <= midPoint; i++) {
    if (str[i] === str[lastIndex - i]) {
        continue
    } else {
        return false
    }
  }

  return true
}

SG Solution 1

function palindrome(str) {
    const reversed = str.split('').reverse().join('');

    return reversed === str;
}

SG Solution 2

function palindrome(str) {
    const strLen = str.length - 1;
    return str.split('').every((char, i) => char === str[strLen - i]);
}

Made with