ColdFusion Developer's Guide - Electromanuals.org

Character case
Ofrecido por www.electromanuales.com
ADOBE COLDFUSION 8
ColdFusion Developer’s Guide
ColdFusion is case-insensitive. For example, the following all represent the cfset tag: cfset, CFSET, CFSet, and
even cfsEt. However, you should get in the habit of consistently using the same case rules in your programs; for
example:
• Develop consistent rules for case use, and stick to them. If you use lowercase characters for some tag names, use
them for all tag names.
• Always use the same case for a variable. For example, do not use both myvariable and MyVariable to represent
the same variable on a page.
Follow these rules to prevent errors on application pages where you use both CFML and case-sensitive languages,
such as JavaScript.
Special characters
The double-quotation marks ("), single-quotation mark ('), and number sign (#) characters have special meaning to
ColdFusion. To include any of them in a string, double the character; for example, use ## to represent a single #
character.
The need to escape the single- and double-quotation marks is context-sensitive. Inside a double-quoted string, you
do not need to escape single-quotation mark (apostrophe) characters. Inside a single-quoted string, you do not
escape double-quotation mark characters.
The following example illustrates escaping special characters, including the use of mixed single- and doublequotation
marks:
#mystring#
#mystring2#
Here is a number sign: ##
The output looks like this:
We all said "Happy birthday to you."
Then we said "How old are you now?"
Here is a number sign: #
Reserved words
As with any programming tool, you cannot use just any word or name for ColdFusion variables, UDFs and custom
tags. You must avoid using any name that can be confused with a ColdFusion element. In some cases, if you use a
word that ColdFusion uses—for example, a built-in structure name—you can overwrite the ColdFusion data.
The following list indicates words you must not use for ColdFusion variables, user-defined function names, or
custom tag names. While some of these words can be used safely in some situations, you can prevent errors by
avoiding them entirely. For a complete list of reserved words, see the CFML Reference.
21