CFLib.org – Common Function Library Project

Description:
This UDF checks to see if a particular string is a BIF (built in function) or UDF (user defined function).

Return Values:
Returns a boolean.

Example:

<CFSET GoodBIF = "arraylen">
<CFSET BadBIF = "victor">
<CFSET GoodUDF = "IsFunction">
<CFSET BadUDF = "newman">
<CFOUTPUT>
Is #GoodBIF# a function? #IsFunction(GoodBIF)#<BR>
Is #BadBIF# a function? #IsFunction(BadBIF)#<BR>
Is #GoodUDF# a function? #IsFunction(GoodUDF)#<BR>
Is #BadUDF# a function? #IsFunction(BadUDF)#<BR>
</CFOUTPUT>

Parameters:

Full UDF Source:

/**
 * Returns true if the function is a BIF (built in function) or UDF (user defined function).
 * 
 * @param name      The name to check. 
 * @return Returns a boolean. 
 * @author Raymond Camden (ray@camdenfamily.com) 
 * @version 1, September 26, 2001 
 */
function IsFunction(str) {
 if(ListFindNoCase(StructKeyList(GetFunctionList()),str)) return 1;
 if(IsDefined(str) AND Evaluate("IsCustomFunction(#str#)")) return 1;
 return 0;
}