Structures and Arrays in ColdFusion - Coldfusion tutorial

Category: Coldfusion tutorials > Basics - Difficulty:

For anyone new to application development, you may be perplexed when you create your form for editing some data that should allow a user to uncheck a checkbox and update a record to a status of not checked. You will sooner or later discover an oddity about HTML forms. HTML forms won't allow you to uncheck like you think you should be able to. If you uncheck the checkbox, the value becomes NULL and the form doesn't bother to pass the field. You will find that ColdFusion does have a simple solution and much more with the CFPARAM tag.

ColdFusion makes it easy to select data out of a database and display it on a page. As soon as you feel good about your success in crossing the divide from static to dynamic, someone will say "That's nice, can you group the list by author?". Whether you are asked to group things by author, make, brand, year or whatever, ColdFusion has you covered with its grouping capabilities.

Among the many features provided by Macromedia's Web server clustering solution, ClusterCATS provides a feature called session-awareness. Session-awareness ensures that when a session begins on a particular clustered Web server, it will remain on that server until it is complete.

There are many things to consider when determining how you will host your ColdFusion site. Issues include tag availability, database needs, disk space, bandwidth, security, support, e-commerce, and software costs.

This technical note describes ColdFusion expressions -- language constructs that allow you to create sophisticated applications.