Set all the elements of the byte array a to zero
clear(a)
clear(a[:])
import java.util.Arrays;
Arrays.fill(a, (byte)0);
FillByte(a, Length(a), 0);
import numpy
a = numpy.ones((n,), numpy.uint8) a.fill(0)
a.fill(0);
No security, no password. Other people might choose the same nickname.