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Palindrome

Challenge Description​

Check if a given string is a palindrome. A palindrome reads the same backward as forward. For example:

  • "abba" is a palindrome.
  • "cddc" is a palindrome.

Tips to Solve​

tip
  1. Convert the string to an array using the split method.
  2. Reverse the array using the reverse method.
  3. Convert the array back to a string using the join method.
  4. Compare the original string with the reversed string.

Step-by-Step Solution​

Let's break down the solution into easy steps:

  1. Convert the String to an Array: Use the split method to convert the string into an array of characters.

    const strArray = "abba".split(""); // ["a", "b", "b", "a"]

  2. Reverse the Array: Use the reverse method to reverse the order of the elements in the array.

    const reversedArray = strArray.reverse(); // ["a", "b", "b", "a"]

  3. Convert the Array Back to a String: Use the join method to combine the elements of the array back into a string.

    const reversedString = reversedArray.join(""); // "abba"

  4. Compare the Strings: Compare the original string with the reversed string to check if they are the same.

    const isPalindrome = "abba" === reversedString; // true

Full Solution Code​

Here is the complete solution using the steps above:

const palindrome = (str) => str.split("").reverse().join("") === str;
console.log(palindrome("abba")); // Output: true
console.log(palindrome("cddc")); // Output: true
console.log(palindrome("hello")); // Output: false