MACROMEDIA COLDFUSION MX 61-CFML, Reference

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ListLen 579
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
Usage
ColdFusion ignores empty list elements; thus, the list "a,b,c,,,d" has four elements.
Here are some examples of ListLen processing:
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>
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.
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