Palindrome

JavaScript

Easy

Objective

Write a function that checks if a given word is a palindrome.

Requirements

The function should be named isPalindrome
It should accept a single string as an argument
It should return true if the string is a palindrome, and false if otherwise
It should ignore case, spaces, and punctuation

Check your solution

Tests

Function name is isPalindrome
isPalindrome("racecar")	Expected:	true
isPalindrome("lorem")	Expected:	false
isPalindrome("12345")	Expected:	false
isPalindrome("Was it a car or a cat I saw?")	Expected:	true

Solution

Here's how I would approach this, but keep in mind there might be other ways to solve this problem.

function isPalindrome(string) {
    // remove all non-alphanumeric characters
    const normalisedString = string.toLowerCase().replace(/[^a-zA-Z0-9]/g, '');

    // reverse the string
    const reverseString = normalisedString.split('').reverse().join('');

    // Check if they match
    return normalisedString === reverseString;
}

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