Function
369
See also
call (Function.call method)
call (Function.call method)
public call(thisObject:
Object
, [parameter1:
Object
])
Invokes the function represented by a Function object. Every function in ActionScript is
represented by a Function object, so all functions support this method.
In almost all cases, the function call (
()
) operator can be used instead of this method. The
function call operator produces code that is concise and readable. This method is primarily
useful when the
thisObject
parameter of the function invocation needs to be explicitly
controlled. Normally, if a function is invoked as a method of an object, within the body of the
function,
thisObject
is set to
myObject
, as shown in the following example:
myObject.myMethod(1, 2, 3);
In some situations, you might want
thisObject
to point somewhere else; for example, if a
function must be invoked as a method of an object, but is not actually stored as a method of
that object:
myObject.myMethod.call(myOtherObject, 1, 2, 3);
You can pass the value null for the
thisObject
parameter to invoke a function as a regular
function and not as a method of an object. For example, the following function invocations
are equivalent:
Math.sin(Math.PI / 4)
Math.sin.call(null, Math.PI / 4)
Returns the value that the called function specifies as the return value.
Availability:
ActionScript 1.0; Flash Lite 2.0
Parameters
thisObject
:
Object
- An object that specifies the value of
thisObject
within the function
body.
parameter1
:
Object
[optional] - A parameter to be passed to the myFunction. You can
specify zero or more parameters.
Returns
Summary of Contents for Flash Lite 2
Page 1: ...Flash Lite 2 x ActionScript Language Reference...
Page 22: ...22 Contents...
Page 244: ...244 ActionScript language elements...
Page 760: ...760 ActionScript classes...
