MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT, Reference Manual

Page: 234 / 816

234 Chapter 12: ActionScript Dictionary
Description
Operator (logical); performs a Boolean operation on the values of one or both of the expressions.
Evaluates
expression1
(the expression on the left side of the operator) and returns
false
if the
expression evaluates to
false
. If
expression1
evaluates to
true
,
expression2
(the expression
on the right side of the operator) is evaluated. If
expression2
evaluates to
true
, the final result is
true
; otherwise, it is
false
.
Example
This example uses the
&&
operator to perform a test to determine if a player has won the game.
The
turns
variable and the
score
variable are updated when a player takes a turn or scores points
during the game. The following script displays “You Win the Game!” in the Output panel when
the player’s score reaches 75 or higher in 3 turns or less.
turns=2;
score=77;
winner = (turns <= 3) && (score >= 75);
if (winner) {
trace("You Win the Game!");
} else {
trace("Try Again!");
}
&= (bitwise AND assignment)
Availability
Flash Player 5.
Usage
expression1 &= expression2
Parameters
None.
Returns
Nothing.
Description
Operator; assigns
expression1
the value of
expression1 & expression2
. For example, the
following two expressions are the same.
x &= y;
x = x & y;
Example
The following example assigns the value
9
to
x
.
x = 15;
y = 9;
trace(x &= y);
// returns 9
See also
& (bitwise AND operator)