Reverse Integer
1 var reverse = function(x) { 2 var isNeg = false, 3 res = 0, 4 temp = 0; 5 6 if (x < 0) { 7 x = -x; 8 isNeg = true; 9 } 10 11 while (x != 0) { 12 res = res * 10 + x % 10; 13 if (res > 2147483648) { 14 return 0; 15 } 16 x = Math.floor(x / 10); 17 } 18 19 return isNeg ? -res : res; 20 };