Operators 143
Floating-point numbers are converted to integers by discarding any digits after the decimal
point. Positive integers are converted to an unsigned hexadecimal value with a maximum
value of 4294967295 or 0xFFFFFFFF; values larger than the maximum have their most
significant digits discarded when they are converted so the value is still 32-bit. Negative
numbers are converted to an unsigned hexadecimal value via the two's complement notation,
with the minimum being -2147483648 or 0x800000000; numbers less than the minimum
are converted to two's complement with greater precision and also have the most significant
digits discarded.
The return value is interpreted as a two's complement number with sign, so the return value is
an integer in the range -2147483648 to 2147483647.
Availability: ActionScript 1.0; Flash Player 5
Operands
expression : Number - A number.
Returns
Number - The result of the bitwise operation.
Example
The following example demonstrates a use of the bitwise NOT (-) operator with flag bits:
var ReadOnlyFlag:Number = 0x0001; // defines bit 0 as the read-only flag
var flags:Number = 0;
trace(flags);
/* To set the read-only flag in the flags variable,
the following code uses the bitwise OR:
*/
flags |= ReadOnlyFlag;
trace(flags);
/* To clear the read-only flag in the flags variable,
first construct a mask by using bitwise NOT on ReadOnlyFlag.
In the mask, every bit is a 1 except for the read-only flag.
Then, use bitwise AND with the mask to clear the read-only flag.
The following code constructs the mask and performs the bitwise AND:
*/
flags &= ~ReadOnlyFlag;
trace(flags);
// output: 0 1 0
See also
& bitwise AND operator, &= bitwise AND assignment operator, ^ bitwise XOR
operator
, ^= bitwise XOR assignment operator, | bitwise OR operator, |=
bitwise OR assignment operator
To Next Page
Loading...