Write function that checks if a given string (case insensitive) is a palindrome.

import "package:test/test.dart"; import "package:solution/solution.dart";

void main() { group("Fixed tests", () { test("Testing for 'a'", () => expect(isPalindrome("a"), equals(true))); test("Testing for 'aba'", () => expect(isPalindrome("aba"), equals(true))); test("Testing for 'Abba'", () => expect(isPalindrome("Abba"), equals(true))); test("Testing for 'hello'", () => expect(isPalindrome("hello"), equals(false))); test("Testing for 'Bob'", () => expect(isPalindrome("Bob"), equals(true))); test("Testing for 'Madam'", () => expect(isPalindrome("Madam"), equals(true))); test("Testing for 'AbBa'", () => expect(isPalindrome("AbBa"), equals(true))); test("Testing for ''", () => expect(isPalindrome(""), equals(true)));

내답:

bool isPalindrome(String x) {
String text =  x.toLowerCase();
String reverse = text.split('').reversed.join('');

if(text == reverse)
{
return true;
}else{
return false;
}
}

bool isPalindrome(String x) {
  x = x.toLowerCase();
  for (int i = 0; i < x.length ~/ 2; i++) {
    if (x[i] != x[x.length - 1 - i]) return false;
  }
  return true;
}

bool isPalindrome(String x) {
  return x.toUpperCase().split("").reversed.join() == x.toUpperCase();
}