(Equality) - MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference

== (equality)

Availability
Flash Player 5.
Usage
expression1 == expression2
Parameters
expression1,expression2
or function.
Returns
A Boolean value.
Description
Operator (equality); tests two expressions for equality. The result is
are equal.
The definition of equal depends on the data type of the parameter:
•
Numbers and Boolean values are compared by value and are considered equal if they have the
same value.
•
String expressions are equal if they have the same number of characters and the characters
are identical.
•
Variables representing objects, arrays, and functions are compared by reference. Two such
variables are equal if they refer to the same object, array, or function. Two separate arrays are
never considered equal, even if they have the same number of elements.
When comparing by value, if
ActionScript will attempt to convert the data type of
. For more information, see "Automatic data typing" and "Operator precedence and
expression1
associativity" in Using ActionScript in Flash.
Example
The following example uses the equality (
var a:String = "David", b:String = "David";
if (a == b) {
trace("David is David");
}
The following examples show the results of operations that compare mixed types:
var x:Number = 5;
var y:String = "5";
trace(x == y);
var x:String = "5";
var y:String = "66";
trace(x == y);
var x:String = "chris";
A number, string, Boolean value, variable, object, array,
expression1
==)
// output: true
// output: false
and are different data types,
expression2
expression2
operator with an
if
if the expressions
true
to match that of
statement:
== (equality) 81