Replaces the contents of a list element.

A copy of a list, with a new value assigned to the element at a specified position.

List functions

ListSetAt(list, position, value [, delimiters ])

ListDeleteAt, ListGetAt, ListInsertAt; "Lists" in Chapter 3, "Using ColdFusion Variables," in ColdFusion MX Developer's Guide

ColdFusion MX: Changed delimiter modification: ColdFusion MX does not modify delimiters in the list. (In earlier releases, in some cases, replaced delimiters with the first character in the delimiters parameter.)

When assigning an element to a list, ColdFusion inserts a delimiter. If delimiters contains more than one delimiter, ColdFusion uses the first delimiter in the string, or, if delimiters was omitted, a comma.

ColdFusion ignores empty list elements; thus, the list "a,b,c,,,d" has four elements.

<h3>ListSetAt Example</h3>
<!--- Find a list of users who wrote messages --->
<cfquery name = "GetMessageUser" datasource = "cfdocexamples">
SELECT Username, Subject, Posted
FROM  Messages
</cfquery>

<cfset temp = ValueList(GetMessageUser.Subject)>

<!--- loop through the list and show it with ListGetAt --->
<h3>This is a list of <cfoutput>#ListLen(temp)#</cfoutput>
subjects posted in messages.</h3>

<cfset ChangedElement = ListGetAt(temp, 2)>
<cfset TempToo = ListSetAt(temp, 2, "I changed this subject", ",")>
<ul>
<cfloop From = "1" To = "#ListLen(temptoo)#" INDEX = "Counter">
   <cfoutput><li>(#Counter#) SUBJECT: #ListGetAt(temptoo, Counter)#
   </cfoutput>
</cfloop>
</ul>
<p>Note that element 2, "<cfoutput>#changedElement#</cfoutput>", 
has been altered to "I changed this subject" using ListSetAt.