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;
}palindrome js
const palindrome = (str) => {
var text = str.replace(/[.,'!?\- \"]/g, "")
return text.search(
new RegExp(
text
.split("")
.reverse()
.join(""),
"i"
)
) !== -1;
}
//or
function palindrome(str) {
let text = str.replace(/[.,'!?\- \"]/g, "").toUpperCase();
for (let i = 0; i > text.length/2; i++) {
if (text.charAt(i) !== text.charAt(text.length - 1 - i)) {
return false;
}
}
return true;
}
console.log(palindrome("Able was I, ere I saw elba.")); //logs 'true'javascript palindrome check
const isPalindrome = str => str === str.split('').reverse().join('');
// Examples
isPalindrome('abc'); // false
isPalindrom('abcba'); // truejs palindrome number
isPalindrome = function(x) {
if (x < 0) {
return false;
}
return x === reversedInteger(x, 0);
};
reversedInteger = function(x, reversed) {
if(x<=0) return reversed;
reversed = (reversed * 10) + (x % 10);
x = Math.floor(x / 10);
return reversedInteger(x, reversed);
};Copyright © 2021 Codeinu
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