--- language: coldfusion filename: learncoldfusion.cfm contributors: - ["Wayne Boka", "http://wboka.github.io"] - ["Kevin Morris", "https://twitter.com/kevinmorris"] --- ColdFusion is a scripting language for web development. [Read more here.](http://www.adobe.com/products/coldfusion-family.html) ### CFML _**C**old**F**usion **M**arkup **L**anguage_ ColdFusion started as a tag-based language. Almost all functionality is available using tags. ```html HTML tags have been provided for output readability " --->

Simple Variables

Set myVariable to "myValue"

Set myNumber to 3.14

Display myVariable: #myVariable#

Display myNumber: #myNumber#

Complex Variables

Set myArray1 to an array of 1 dimension using literal or bracket notation

Set myArray2 to an array of 1 dimension using function notation

Contents of myArray1

Contents of myArray2

Operators

Arithmetic

1 + 1 = #1 + 1#

10 - 7 = #10 - 7#

15 * 10 = #15 * 10#

100 / 5 = #100 / 5#

120 % 5 = #120 % 5#

120 mod 5 = #120 mod 5#

Comparison

Standard Notation

Is 1 eq 1? #1 eq 1#

Is 15 neq 1? #15 neq 1#

Is 10 gt 8? #10 gt 8#

Is 1 lt 2? #1 lt 2#

Is 10 gte 5? #10 gte 5#

Is 1 lte 5? #1 lte 5#

Alternative Notation

Is 1 == 1? #1 eq 1#

Is 15 != 1? #15 neq 1#

Is 10 > 8? #10 gt 8#

Is 1 < 2? #1 lt 2#

Is 10 >= 5? #10 gte 5#

Is 1 <= 5? #1 lte 5#

Control Structures

Condition to test for: "#myCondition#"

#myCondition#. We're testing. #myCondition#. Proceed Carefully!!! myCondition is unknown

Loops

For Loop

Index equals #i#

For Each Loop (Complex Variables)

Set myArray3 to [5, 15, 99, 45, 100]

Index equals #i#

Set myArray4 to ["Alpha", "Bravo", "Charlie", "Delta", "Echo"]

Index equals #s#

Switch Statement

Set myArray5 to [5, 15, 99, 45, 100]

#i# is a multiple of 5.

#i# is ninety-nine.

#i# is not 5, 15, 45, or 99.

Converting types

Value	As Boolean	As number	As date-time	As string
"Yes"	TRUE	1	Error	"Yes"
"No"	FALSE	0	Error	"No"
TRUE	TRUE	1	Error	"Yes"
FALSE	FALSE	0	Error	"No"
Number	True if Number is not 0; False otherwise.	Number	See "Date-time values" earlier in this chapter.	String representation of the number (for example, "8").
String	If "Yes", True If "No", False If it can be converted to 0, False If it can be converted to any other number, True	If it represents a number (for example, "1,000" or "12.36E-12"), it is converted to the corresponding number.	If it represents a date-time (see next column), it is converted to the numeric value of the corresponding date-time object. If it is an ODBC date, time, or timestamp (for example "{ts '2001-06-14 11:30:13'}", or if it is expressed in a standard U.S. date or time format, including the use of full or abbreviated month names, it is converted to the corresponding date-time value. Days of the week or unusual punctuation result in an error. Dashes, forward-slashes, and spaces are generally allowed.	String
Date	Error	The numeric value of the date-time object.	Date	An ODBC timestamp.

Components

Code for reference (Functions must return something to support IE)

<cfcomponent>
	<cfset this.hello = "Hello" />
	<cfset this.world = "world" />

	<cffunction name="sayHello">
		<cfreturn this.hello & ", " & this.world & "!" />
	</cffunction>
	
	<cffunction name="setHello">
		<cfargument name="newHello" type="string" required="true" />
		
		<cfset this.hello = arguments.newHello />
		 
		<cfreturn true />
	</cffunction>
	
	<cffunction name="setWorld">
		<cfargument name="newWorld" type="string" required="true" />
		
		<cfset this.world = arguments.newWorld />
		 
		<cfreturn true />
	</cffunction>
	
	<cffunction name="getHello">
		<cfreturn this.hello />
	</cffunction>
	
	<cffunction name="getWorld">
		<cfreturn this.world />
	</cffunction>
</cfcomponent>

sayHello()

#sayHello()#

getHello()

#getHello()#

getWorld()

#getWorld()#

setHello("Hola")

#setHello("Hola")#

setWorld("mundo")

#setWorld("mundo")#

sayHello()

#sayHello()#

getHello()

#getHello()#

getWorld()

#getWorld()#

``` ### CFScript _**C**old**F**usion **S**cript_ In recent years, the ColdFusion language has added script syntax to mirror tag functionality. When using an up-to-date CF server, almost all functionality is available using scrypt syntax. ## Further Reading The links provided here below are just to get an understanding of the topic, feel free to Google and find specific examples. 1. [Coldfusion Reference From Adobe](https://helpx.adobe.com/coldfusion/cfml-reference/topics.html) 2. [Open Source Documentation](http://cfdocs.org/)