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22 changes: 21 additions & 1 deletion exercises/LC125_isPalindrome/index.js
Original file line number Diff line number Diff line change
@@ -1,3 +1,23 @@
function isPalindrome(s) {}
function isPalindrome(s) {
/* Sanitize input string to only look
for alphanumeric characters
*/
s.toLowerCase().replace(/[\W_]/g, "");

/*
Create a left and right pointer
*/
let left = 0;
let right = s.length - 1;

while (left < right) {
if (s[left] !== s[right]) {
return false;
}
left++;
right--;
}
console.log("true");
}

module.exports = isPalindrome;