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ListGetDuplicates
Last update:
May 18, 2026
Description
Returns duplicate items in a list.
Returns
A new list
Category
Syntax
listGetDuplicates(list,delimiter,ignoreCase,includeEmptyFields)See also
Other list functions.
History
- ColdFusion (2021 release): Added the function.
Parameters
Parameter | Description |
list | Name of the list object. |
delimiter | (String) 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 processes each occurrence of each character as a delimiter. |
ignoreCase | (True/False) If true, the function performs a case-sensitive string search. |
| includeEmptyFields | (True/False) if true, the function ignores blank values in the list. |
Example
<cfscript>
list1 = "one,one,ONE,two,three,,four,THREE,FOUR,FIVE,";
newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=true);
writeoutput(newlist1)
</cfscript>Output
one,THREE,FOUR
Example ignoreCase=FALSE
<cfscript>
list1 = "one,one,ONE,two,three,,four,THREE,FOUR,FIVE,";
newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=false);
writeoutput(newlist1)
</cfscript>Output
one
Example- numeric list
<cfscript>
list1 = "1, 2, 22, 3, 2, 5, 5, 1";
newList1 = listgetduplicates(list=list1);
writeOutput(newlist1)
</cfscript>Output
2,5,1
Example- dashed list
<cfscript>
list1 = "1-2-22-3-2-5-5-1";
newList1 = listgetduplicates(list=list1, delimiter="-");
writeOutput(newlist1)
</cfscript>Output
2-5-1
Example- includeemptyfields=true
<cfscript>
list1 = "one,one,ONE,two,three,,,four,THREE,FOUR,FIVE,";
newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=true,includeemptyfields=true);
writeOutput(newlist1)
</cfscript>Output
one,,THREE,FOUR
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