ActionScript Operators


Operators are used to manipulate variables in expressions.

Operator

Operator Name

Syntax

Arguments and Description

-

decrement

--expression

expression-

--expression

Subtracts 1 from expression and returns the result.

expression--

Subtracts 1 from the expression and returns the initial value of the expression.

++

increment

++expression

expression++

++expression

Adds 1 to the expression and returns the result.

expression++

Adds 1 to the expression and returns the initial value of the expression.

!

logical NOT

!expression

If expression was set to true, !expression would return false.

!=

inequality

expression1 != expression2

If expression1 is not equal to expression2, it returns true.

%

modulo

expression1 % expression2

Calculates the remainder of expression1 divided by expression2.

%=

modulo assignment

expression1 %= expression2

Calculates the remainder of expression1 divided by expression2 and assigns the value to expression1.

&

bitwise assignment

expression1 & expression2

Converts expression1 and expression2 to 32-bit unsigned integers and performs a Boolean AND operation; a new 32-bit unsigned integer is returned.

 

minus

 

Used for negating or subtracting.

   

-expression1

-expression1 negates the value contained in expression1.

   

expression1 - expression2

expression1-expression2

Subtracts the value of expression2 from expression1.

*

multiplication

expression1 * expression2

expression1 * expression2

Multiplies the numbers .

*=

multiplication assignment

expression1 *= expression2

expression1 * expression2

Multiplies the numbers and assigns the value to expression1.

?:

conditional

expression1 ? expression2 : expression3

expression1 ? expression2 : expression3

Instructs Flash to evaluate expression1 and return the value of expression2 if expression1 is true; otherwise , return the value of the expression3.

/

division

expression1 / expression2

expression1 / expression2

Divides the numbers.

//

comment delimiter

// comment

 

/=

division assignment

expression1 /= expression2

expression1 / expression2

Divides the numbers and assigns the values to expression1.

^

bitwise XOR

expression1 ^ expression2

Converts expression1 and expression2 to 32-bit unsigned integers and performs a Boolean OR operation; a new 32-bit unsigned integer is returned.

^=

bitwise XOR assignment

expression1 ^= expression2

Converts expression1 and expression2 to 32-bit unsigned integers and performs a Boolean AND operation; a new 32-bit unsigned integer is returned and assigns the value to expression1.

bitwise OR

expression1 expression2

Converts expression1 and expression2 to 32-bit unsigned integers and returns a 1 in each bit position where the corresponding bits of either expression1 or expression2 are 1.

logical OR

expression1 expression2

Evaluates expression1 and expression2, and if both expression1 and expression2 are true, returns true.

=

bitwise OR assignment

expression1 + expression2

Converts expression1 and expression2 to 32-bit unsigned integers and returns a 1 in each bit position where the corresponding bits of either expression1 or expression2 are 1, and then assigns the value to expression1.

~

bitwise NOT

~ expression

Converts the expression to a 32-bit unsigned integer, and then reverses the value of the bits.

+

addition

expression1 + expression2

Adds numeric expressions and concatenates strings.

+=

addition assignment

expression1 += expression2

Adds numeric expressions and concatenates strings and assigns the value to expression1.

<

less than

expression1 < expression2

Compares two expressions and determines whether expression1 is less than expression2.

<<

bitwise left shift

expression1 << expression2

Converts expression1 and expression2 to 32-bit integers and shifts all bits in expression1 to the left by the number of places specified by the integer resulting from the conversion of expression2.

<<=

bitwise left shift and assignment

expression1 <<= expression2

Converts expression1 and expression2 to 32-bit integers, shifts all bits in expression1 to the left by the number of places specified by the integer resulting from the conversion of expression2, and assigns the value to expression1.

<=

less than or equal to

expression1 <= expression2

Returns true when expression1 is less than or equal to expression2; returns false when expression1 is greater than expression2.

<>

inequality

expression1 <> expression2

Returns true when expression1 is not equal to expression2.

=

assignment

expression1 = expression2

Assigns the value of expression2 to expression1.

-=

negation assignment

expression1 -= expression2

Subtracts the two numbers and assigns the value to expression1.

==

equality

expression1 == expression2

If expression1 is equal to expression2, it returns true.

>

greater than

expression1 > expression2

Returns true when expression1 is greater than expression2; returns false when expression1 is less than or equal to expression2.

>=

greater than or equal to

expression1 >= expression2

Returns true when expression1 is greater than expression2; returns false when expression1 is less than expression2.

>>

bitwise shift right

expression1 >> expression2

Converts expression1 and expression2 to 32-bit integers and shifts all bits in expression1 to the right by the number of places specified by the integer resulting from the conversion of expression2.

>>=

bitwise shift right and assignment

expression1 >>= expression2

Converts expression1 and expression2 to 32-bit integers, shifts all bits in expression1 to the right by the number of places specified by the integer resulting from the conversion of expression2, and assigns the value to expression1.

>>>

bitwise unsigned right shift

expression1 >>> expression2

Same as the bitwise right-shift operator (>>), except that it does not preserve the sign of the original expression because the bits on the left are always filled with 0.

>>>=

bitwise unsigned right shift and assignment

expression1 >>>= expression2

Same as the bitwise right-shift operator (>>), except that it does not preserve the sign of the original expression because the bits on the left are always filled with 0; assigns the value to expression1.



Inside Flash
Inside Flash MX (2nd Edition) (Inside (New Riders))
ISBN: 0735712549
EAN: 2147483647
Year: 2005
Pages: 257
Authors: Jody Keating

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