CFLib.org – ListDeleteDuplicatesNoCase

ListDeleteDuplicatesNoCase(list)

Last updated July 2, 2008

author

Version: 1 | Requires: ColdFusion 5 | Library: StrLib

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Description:
Simply pass it a list and optional delimiter. The function will look for case-insensitive matches, removing any it finds, and return a new list without duplicates.

Return Values:
Returns a list.

Example:

<cfset myList = "apples,oranges,apples,bananas,ORANGES">

<cfoutput>
List before removing dupes: #myList#<br>
List after removing dupes: #ListDeleteDuplicatesNoCase(myList)#
</cfoutput>

Parameters:

Name	Description	Required
list	List to be modified.	Yes

Full UDF Source:

	
	<cfscript>
/**
 * Case-insensitive function for removing duplicate entries in a list.
 * Based on dedupe by Raymond Camden
 * 
 * @param list      List to be modified. (Required)
 * @return Returns a list. 
 * @author Jeff Howden (cflib@jeffhowden.com) 
 * @version 1, July 2, 2008 
 */
function ListDeleteDuplicatesNoCase(list) {
  var i = 1;
  var delimiter = ',';
  var returnValue = '';
  if(ArrayLen(arguments) GTE 2)
    delimiter = arguments[2];
  list = ListToArray(list, delimiter);
  for(i = 1; i LTE ArrayLen(list); i = i + 1)
    if(NOT ListFindNoCase(returnValue, list[i], delimiter))
      returnValue = ListAppend(returnValue, list[i], delimiter);
  return returnValue;
}
</cfscript>