ListLen  
Description
Determines the number of elements in a list.
Integer; the number of elements in a list.
 
Category
List functions
 
Function syntax
ListLen(list [, delimiters ])
 
See also
ListAppend, ListDeleteAt, ListInsertAt, ListPrepend
 
Parameters
 
Parameter      Description
list A list or a variable that contains one.
delimiters A string or a variable that contains one. Character(s) that separate list elements.
  Default: comma.
  If this parameter contains more than one character, ColdFusion processes each
  occurrence of each character as a delimiter.**bug 24114 tlane
 
Usage
ColdFusion ignores empty list elements; thus, the list "a,b,c,,,d" has four elements.
 
Here are some examples of ListLen processing:
Statement Output Comment
ListLen('a,b, c,,,d')
4 Third element is " c"
ListLen('a,b, c,,,d',',') 4 Fourth element is "d'"
ListLen('elem_1___elem_2___elem_3') 1  
ListLen('elem*1***elem*2***elem*3')
1  
ListLen('elem_1___elem_2___elem_3','_') 6  
 
Example
<h3>ListLen Example</h3>
<!--- Find a list of users who wrote messages --->
<cfquery name = "GetMessageUser" datasource = "cfsnippets">
   SELECT Username, Subject, Posted
   FROM  Messages
</cfquery>
<cfset temp = ValueList(GetMessageUser.Username)>
<!--- loop through the list and show it with ListGetAt --->
<h3>This is a list of usernames who have posted messages
<cfoutput>#ListLen(temp)#</cfoutput> users.</h3>
<ul>
<cfloop From = "1" TO = "#ListLen(temp)#" INDEX = "Counter">
   <cfoutput><li>Username #Counter#:
    #ListGetAt(temp, Counter)#</cfoutput>
</cfloop>
</ul>
list  
A list or a variable that contains one.
delimiters  
A string or a variable that contains one. Character(s) that separate list elements. Default: comma.
If this parameter contains more than one character, ColdFusion processes each occurrence of each character as a delimiter.