User Guide

422 CFML Language Reference
ListPrepend
Returns list with value inserted at the first position, shifting all other elements one to
the right.
See also ListAppend, ListInsertAt, and ListSetAt.
Syntax ListPrepend( list , value [, delimiters ])
list
Any list.
value
Number or list being prepended.
delimiters
Set of delimiters used in list.
Usage When prepending an element to a list, ColdFusion needs to insert a delimiter. If
delimiters contain more than one delimiter, ColdFusion defaults to the first delimiter
in the string, or, (comma) if delimiters was omitted.
If you intend to use list functions on strings that are delimited by the conjunction ", "
(comma-space), as is common in HTTP header strings such as the COOKIE header, we
recommend that you specify delimiters to include both comma and space because
ColdFusion Server does not skip white space.
Examples <!--- This example shows ListPrepend --->
...
<!--- First, query to get some values for our list --->
<CFQUERY NAME="GetParkInfo" DATASOURCE="cfsnippets">
SELECT PARKNAME,CITY,STATE
FROM PARKS
WHERE PARKNAME LIKE ‘DE%’
</CFQUERY>
<CFSET temp = ValueList(GetParkInfo.ParkName)>
<CFSET first_item = ListFirst(temp)>
<CFOUTPUT>
<P>The original list: #temp#
</CFOUTPUT>
<!--- now, insert an item at position 1--->
<CFSET temp2 = ListPrepend(Temp, "my Inserted Value", ",")>
...