come invertire una stringa
function reverseString(str) {
return str.split("").reverse().join("");
}
reverseString("hello");
invertire una stringa
public static String reverse(String orig)
{
char[] s = orig.toCharArray();
int n = s.length;
int halfLength = n / 2;
for (int i=0; i<halfLength; i++)
{
char temp = s[i];
s[i] = s[n-1-i];
s[n-1-i] = temp;
}
return new String(s);
}