August 2001
Intermediate to advanced
976 pages
38h 8m
English
Content preview from Programming ColdFusionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Datatypes
ColdFusion supports a number of datatypes for use in building expressions. These datatypes can be broken into two categories, simple and complex. The simple datatypes are made up of Booleans, strings, numbers (both integer and floating point), and date/time objects:
- Boolean
ColdFusion uses the Boolean datatype to store the value generated by a logical operation. Boolean values are stored as either
TRUEorFALSE. In numeric operations, Boolean values evaluate to1forTRUEand0forFALSE. When dealing with strings, Boolean values are set toYesforTRUEandNoforFALSE. Note that no quotes are necessary to delimit Boolean values.- Strings
ColdFusion stores text values in strings delimited by a set of single or double quotes. For example,
"This is a string."and'So is this!'are both strings."1000"and'1000'are also strings so long as the numbers are delimited by a set of quotes. The empty string can be written as either''or"". There are certain special characters that must be escaped within strings. These special characters are the single quote ('), double quote ("), and pound sign (#). These characters may be escaped by doubling up on them as in the following examples:<CFSET String1 = "This is a ""good"" use of escaped double quotes"> <CFSET String2 = "This is a ''good'' use of escaped single quotes"> <CFSET String3 = "What is the ##1 team in the league?">
As we’ll discuss in the next section,
<CFSET>is a CFML tag you use to set a variable to a particular ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.