KEYWORDS: Empty, False,
New, Nothing, Null, True
Implemented in version 1.0
Empty
The Empty keyword is the value that a variable is automatically
assigned when it is declared using the Dim statement. It is important
to understand that this means that a declared variable does have a value,
Empty, even if you have purposely not assigned a value in your
code.
You can test whether a variable is empty using the IsEmpty
function. Also, Empty is not the same as Null or Nothing.
False
The False keyword has the value of 0. You can use that value
as a basis for testing in conditional statements.
New
The New keyword is used in conjunction with Set to create
an instance of a Class or a RegExp. First, using Dim,
you must declare the name of the variable that the instance will be
assigned. Then, you can create the instance.
Code:
<%
Dim SearchPattern
Set SearchPattern = New RegExp
%>
Nothing
The Nothing keyword is used to disassociate an object variable
from an object. If several object variables refer to the same object,
all must be set to Nothing before system resources are released.
You must assign Nothing using the Set keyword.
Code:
<% Set YourObject = Nothing %>
Null
The Null keyword indicates that a variable contains no valid
data. You can assign a variable the value of Null and use the
IsNull() function to test whether a variable is Null.
If you print the variable out, the output should be Null.
Also, Null is not the same as Empty or Nothing.
True
The True keyword has the value of -1. You can use that value
as a basis for testing in conditional statements.
Copyright 1999-2001 by Infinite Software Solutions, Inc. All rights reserved.
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