Description
Inserts an element at the beginning of a list.
Returns
A copy of the list_,_ with value inserted at the first position.
ListPrepend(list, value [, delimiters ])
See also
ListAppend, ListInsertAt, ListSetAt; Lists in Data types- Developing guide in the Developing ColdFusion Applications
Parameters
Parameter |
Description |
|---|---|
list |
A list or a variable that contains one. |
value |
An element or a list of elements. |
delimiters |
A string or a variable that contains one. Characters that separate list elements. The default value is comma. If this parameter contains more than one character, ColdFusion only uses the first character and ignores the others. |
Usage
When prepending an element to a list, ColdFusion inserts a delimiter. If delimiters_ contains more_ than one delimiter character, ColdFusion uses the first delimiter in the string; if delimiters is omitted, ColdFusion uses a comma.ColdFusion ignores empty list elements; thus, the list "a,b,c,,,d" has four elements.If the delimiters parameter is the empty string (""), ColdFusion returns the contents of the value parameter.
Example
<!--- This example shows ListPrepend ---> <cfquery name = "GetParkInfo" datasource = "cfdocexamples"> SELECT PARKNAME,CITY,STATE FROM PARKS WHERE PARKNAME LIKE 'DE%' </cfquery> <cfset temp = ValueList(GetParkInfo.ParkName)> <cfset first_element = ListFirst(temp)> <cfoutput><p>The original list: #temp#</cfoutput> <!--- now, insert an element at position 1---> <cfset temp2 = ListPrepend(Temp, "my Inserted Value")>
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