VBScript Tutorials - Herong's Tutorial Examples - v6.02, by Herong Yang
"Type mismatch" Runtime Error - Assignments to Array Variables
This section describes how values from scalar array variables can be assigned to other scalar or array variables. Runtime error 'Type mismatch' happens when you try to assign scalar values or arrays to array variables.
After learning two types of variables: scalar variable and array variable, let's review and summarize how assignment operation works with both types in this section.
1. Can you assign the value of a scalar variable to another scalar variable? The answer is simple: "Yes". For example:
another_scalar_variable = scalar_variable
2. Can you assign the value of a scalar variable to an array variable? The answer is simple: "No". For example:
array_variable = scalar_variable
3. Can you assign the value of an array variable to a scalar variable? The answer is not so simple.
Technically, a scalar variable is not capable to store an array. So the answer is no - you can not assign an array directly to a scalar variable.
But a scalar variable can be used to store a reference, or a pointer, of an array. So the answer is yes - you can assign an array indirectly to a scalar variable. For example:
scalar_variable = array_variable
4. Can you assign the value of an array variable to another array variable? The answer is simple: "No". For example:
another_array_variable = array_variable
Try to play with the following example to understand how assignment operation works with scalar variables and array variables:
<html> <body> <!-- array_type_mismatch.html - Copyright (c) 1998 HerongYang.com. All Rights Reserved. --> <pre> <script language="vbscript"> Dim aScalar Dim anotherScalar Dim anArray(9) Dim anotherArray(9) anotherScalar = aScalar 'Creates a copy of aScalar's value anArray = aScalar 'Runtime error: Type mismatch aScalar = anArray 'Creates a copy of anArray's array anotherArray = anArray 'Runtime error: Type mismatch </script> </pre> </body> </html>
Table of Contents
Introduction of VBScript - Visual Basic Scripting Edition
Variant Data Type, Subtypes, and Literals
Numeric Comparison Operations and Logical Operations
String Operations - Concatenation and Comparison
Variable Declaration and Assignment Statement
Expression and Order of Operation Precedence
Statement Syntax and Statement Types
Array Data Type and Related Statements
►Array References and Array Assignment Statements
Assigning an Array to a Scalar Variable
Array References Work Like Arrays
"Array()" Function - Returning a Scalar Reference of an Array
►"Type mismatch" Runtime Error - Assignments to Array Variables
Conditional Statements - "If ... Then" and "Select Case"
Loop Statements - "For", "While", and "Do"
"Function" and "Sub" Procedures
Inspecting Variables Received in Procedures
Error Handling Flag and the "Err" Object
Regular Expression Pattern Match and Replacement
scrrun.dll - Scripting Runtime DLL Library
IE Web Browser Supporting VBScript
IIS ASP Server Supporting VBScript