260 Chapter 12: ActionScript Dictionary
== (equality)
Availability
Flash Player 5.
Usage
expression1 == expression2
Parameters
expression1,expression2
A number, string, Boolean value, variable, object, array,
or function.
Returns
A Boolean value.
Description
Operator (equality); tests two expressions for equality. The result is true if the expressions
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, objects, arrays, and functions are compared by reference. Two 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.
Example
Usage 1: The following example uses the == operator with an if statement:
a = "David" , b = "David";
if (a == b){
trace("David is David");
}
Usage 2: These examples show the results of operations that compare mixed types.
x = "5"; y = "5";
trace(x == y);
// true
x = "5"; y = "66";
trace(x ==y);
// false
x = "chris"; y = "steve";
trace (x == y);
//false
See also
!= (inequality)
, === (strict equality), !== (strict inequality)
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