MACROMEDIA COLFUSION MX 7-CFML Reference page 581

Evaluate
Description
Evaluates one or more string expressions, dynamically, from left to right. (The results of an
evaluation on the left can have meaning in an expression to the right.) Returns the result of
evaluating the rightmost expression.
Returns
An object; the result of the evaluation(s).
Category
Dynamic evaluation functions
Function syntax
Evaluate(string_expression1 [, string_expression2 [, ... ] ] )
See also
,
DE IIf
Parameters
Parameter
string_expression1,
string_expression2...
Usage
String expressions can be complex. If a string expression contains a single- or double-quotation
mark, the mark must be escaped.
This function is useful for forming one variable from multiple variables. For example, to reference
a column of the query qNames with a variable,
could use the following code:
<cfset var=Evaluate("qNames.#colname#[#index#]")>
For more information, see Chapter 4, "Using Expressions and Number Signs" in ColdFusion MX
Developer's Guide.
Example
<!--- This example shows the use of DE and Evaluate --->
<h3>Evaluate Example</h3>
<cfif IsDefined("FORM.myExpression")>
<cftry>
<!--- Evaluate the expression --->
<cfset myExpression = Evaluate(FORM.myExpression)>
<!--- Use DE to output the value of the variable, unevaluated --->
<cfoutput>
The value of the expression #Evaluate(DE(FORM.MyExpression))#
is #MyExpression#.
</cfoutput>
...
Description
Expressions to evaluate
, using an index value to traverse rows, you
var
Evaluate 581