Table of Contents
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Category
Binary
Object
For more information on ColdFusion data types, see
on page
53.
ColdFusion components
ColdFusion components encapsulate multiple, related, functions. A ColdFusion component is
essentially a set of related user-defined functions and variables, with additional functionality to
provide and control access to the component contents. ColdFusion components can make their
data private, so that it is available to all functions (also called methods) in the component, but not
to any application that uses the component.
ColdFusion components have the following features:
•
They are designed to provide related services in a single unit.
•
They can provide web services and make them available over the internet.
•
They can providing ColdFusion services that Flash clients can call directly.
•
They have several features that are familiar to object-oriented programmers including data
hiding, inheritance, packages, and introspection.
For more information on ColdFusion components, see
ColdFusion Components," on page 219
CFScript
CFScript is a language within a language. CFScript is a scripting language that is similar to
JavaScript but is simpler to use. Also, unlike JavaScript CFScript only runs on the ColdFusion
server; it does not run on the client system. A CFScript script can use all ColdFusion functions
and all ColdFusion variables that are available in the script's scope.
CFScript provides a compact and efficient way to write ColdFusion logic. Typical uses of
CFScript include:
•
Simplifying and speeding variable setting
•
Building compact flow control structures
•
Encapsulating business logic in user-defined functions
The following sample script populates an array and locates the first array entry that starts with the
word "key". It shows several of the elements of CFScript, including setting variables, loop
structures, script code blocks, and function calls. Also, the code uses a
results. While you can use CFScript for output, the
<cfscript>
strings = ArrayNew(1);
strings[1]="the";
strings[2]="key to our";
strings[4]="idea";
for( i=1 ; i LE 4 ; i = i+1 )
{
46
Chapter 2: Elements of CFML
Description and types
Raw data, such as the contents of a GIF file or an executable program file
COM, CORBA, Java, web services, and ColdFusion Component objects:
Complex objects that you create and access using the
specialized tags.
cfobject
Chapter 3, "Using ColdFusion Variables,"
Chapter 11, "Building and Using
cfoutput
tag is usually easier to use.
cfoutput
tag and other
tag to display its
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Table of Contents
Troubleshooting
