Making both elements of an array zero

Given an Array of two elements one of which is 0, the other is either 0 or 1. You have to make both the elements of array 0. But following are the constraints:

1. 1.You can use only one operation, Complement (Logical NOT). No other mathematical operation is allowed.
2. 2.You cannot use if-else or loop construct.
3. 3.You cannot directly assign 0 to array positions

Solution:

    arr[arr[1]] = arr[!arr[1]];

    arr[!arr[0]] = arr[!arr[1]];

    arr[arr[1]] = arr[arr[0]];

    arr[0] = arr[arr[0]]; arr[1] = arr[0];