Answers for "palindrome number fastest js soution"

palindrome in javascript

function palindrome(str) {

    var len = str.length;
    var mid = Math.floor(len/2);

    for ( var i = 0; i < mid; i++ ) {
        if (str[i] !== str[len - 1 - i]) {
            return false;
        }
    }

    return true;
}

find longest palindrome javascript algorithm

var longestPalindrome = function(s) {
    let start, end, result = 0;
    
    for(let i=0; i < s.length; i++) {
        let tempStart = i;
        let tempEnd = i;
        
        while(s[tempEnd] === s[tempEnd+1]) tempEnd++;
        
        while(tempStart >= 0 && tempEnd < s.length && s[tempStart-1] == s[tempEnd+1]) {
            tempStart--;
            tempEnd++
        }
        
        if(result < tempEnd - tempStart+1) {
            result = tempEnd - tempStart+1;
            start = tempStart;
            end = tempEnd;
        }
    }
    return s.substring(start, end+1);
};