ListGetDuplicates

Last updated on Feb 25, 2025

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CFML Reference

Cloud services

CFML Reference User Guide
ColdFusion functions
ColdFusion tags
1. ColdFusion tag summary
2. ColdFusion tags by category
  1. Application framework tags
    1. cfapplication
    2. cfassociate
    3. cferror
    4. cfimport
    5. cfinterface
    6. cflock
    7. cfscript
    8. cfthread
  2. Communications tags
  3. Database manipulation tags
  4. Data output tags
    1. cfchart
  5. Debugging tags
    1. cfdump
    2. cftimer
    3. cftrace
  6. Exception handling tags
    1. cfcatch
    2. cferror
    3. cffinally
    4. cfrethrow
    5. cfthrow
    6. cftry
  7. Extensibility tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcollection
    5. cfcomponent
    6. cfexecute
    7. cfftp
    8. function
    9. cfindex
    10. cfinterface
    11. cfinvoke
    12. cfinvokeargument
    13. cfobject
    14. cfproperty
    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
    19. cfsharepoint
    20. cfspreadsheet
    21. cfwddx
    22. cfxml
  8. File management tags
    1. cfdirectory
    2. cffile
    3. cffileupload
    4. cfftp
    5. cfzip
    6. cfzipparam
  9. Flow-control tags
    1. cfabort
    2. cfbreak
    3. cfcase
    4. cfcontinue
    5. cfdefaultcase
    6. cfelse
    7. cfelseif
    8. cfexecute
    9. cfexit
    10. cfif
    11. cfinclude
    12. cflocation
    13. cfloop
    14. cfrethrow
    15. cfswitch
    16. cfthrow
    17. cftry
  10. Forms tags
    1. cfapplet
    2. cfcalendar
    3. cffileupload
    4. cfform
    5. cfformgroup
    6. cfformitem
    7. cfgrid
    8. cfgridcolumn
    9. cfgridrow
    10. cfgridupdate
    11. cfinput
    12. cfpdf
    13. cfpdfform
    14. cfpdfformparam
    15. cfpdfparam
    16. cfpdfsubform
    17. cfselect
    18. cfslider
    19. cftextarea
    20. cftree
    21. cftreeitem
  11. Internet Protocol tags
    1. cfajaximport
    2. cfajaxproxy
    3. cfftp
    4. cffeed
    5. cfimap
    6. cfhttp
    7. cfhttpparam
    8. cfldap
    9. cfmail
    10. cfmailparam
    11. cfmailpart
    12. cfpop
    13. cfsprydataset
  12. Page processing tags
    1. cfcache
    2. cfcontent
    3. cfflush
    4. cfheader
    5. cfhtmlhead
    6. cfinclude
    7. cfprocessingdirective
    8. cfsetting
    9. cfsilent
  13. Security tags
  14. Variable manipulation tags
    1. cfcookie
    2. cfdump
    3. cfparam
    4. cfregistry
    5. cfsavecontent
    6. cfschedule
    7. cfset
    8. cfsetting
  15. Other tags
    1. cfimage
    2. cflog
    3. cfregistry
3. Tags a-b
4. Tags c
5. Tags f
6. Tags g-h
  1. cfgraph
  2. cfgraphdata
  3. cfgrid
  4. cfgridcolumn
  5. cfgridrow
  6. cfgridupdate
  7. cfheader
  8. cfhtmlhead
  9. cfhtmltopdf
  10. cfhtmltopdfitem
  11. cfhttp
  12. cfhttpparam
7. Tags i
  1. cfif
  2. cfimage
  3. cfimap
  4. cfimapfilter
  5. cfimpersonate
  6. cfimport
  7. cfinclude
  8. cfindex
  9. cfinput
  10. cfinsert
  11. cfinterface
  12. cfinvoke
  13. cfinvokeargument
8. Tags j-l
9. Tags m-o
10. Tags p-q
  1. cfparam
  2. cfpdf
  3. cfpdfform
  4. cfpdfformparam
  5. cfpdfparam
  6. cfpdfsubform
  7. cfpod
  8. cfpop
  9. cfpresentation
  10. cfpresentationslide
  11. cfpresenter
  12. cfprint
  13. cfprocessingdirective
  14. cfprocparam
  15. cfprocresult
  16. cfprogressbar
  17. cfproperty
  18. cfquery
  19. cfqueryparam
11. Tags r-s
  1. cfregistry
  2. cfreport
  3. cfreportparam
  4. cfrethrow
  5. cfreturn
  6. cfsavecontent
  7. cfschedule
  8. cfscript
  9. cfsearch
  10. cfselect
  11. cfservlet
  12. cfservletparam
  13. cfset
  14. cfsetting
  15. cfsharepoint
  16. cfsilent
  17. cfslider
  18. cfspreadsheet
  19. cfsprydataset
  20. cfstoredproc
  21. cfswitch
12. Tags t
  1. cftable
  2. cftextarea
  3. cftextinput
  4. cfthread
  5. cfthrow
  6. cftimer
  7. cftooltip
  8. cftrace
  9. cftransaction
  10. cftree
  11. cftreeitem
  12. cftry
13. Tags u-z
  1. cfupdate
  2. cfwddx
  3. cfwebsocket
  4. cfwindow
  5. cfxml
  6. cfzip
  7. cfzipparam
CFML Reference
1. Reserved words and variables
2. Ajax JavaScript functions
3. ColdFusion ActionScript functions
4. ColdFusion mobile functions
5. Application.cfc reference
6. Script functions implemented as CFCs
7. ColdFusion Flash Form style reference
8. ColdFusion event gateway reference
9. ColdFusion C++ CFX Reference
10. ColdFusion Java CFX reference
11. WDDX JavaScript Objects
Cloud services

Description

Returns duplicate items in a list.

Returns

A new list

Syntax

listGetDuplicates(list,delimiter,ignoreCase,includeEmptyFields)

listGetDuplicates(list,delimiter,ignoreCase,includeEmptyFields)

History

ColdFusion (2025 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

list1 = "one,one,ONE,two,three,,four,THREE,FOUR,FIVE,";

newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=true);

writeoutput(newlist1)

</cfscript>

<cfscript> list1 = "one,one,ONE,two,three,,four,THREE,FOUR,FIVE,"; newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=true); writeoutput(newlist1) </cfscript>

<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

list1 = "one,one,ONE,two,three,,four,THREE,FOUR,FIVE,";

newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=false);

writeoutput(newlist1)

</cfscript>

<cfscript> list1 = "one,one,ONE,two,three,,four,THREE,FOUR,FIVE,"; newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=false); writeoutput(newlist1) </cfscript>

<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

list1 = "1, 2, 22, 3, 2, 5, 5, 1";

newList1 = listgetduplicates(list=list1);

writeOutput(newlist1)

</cfscript>

<cfscript> list1 = "1, 2, 22, 3, 2, 5, 5, 1"; newList1 = listgetduplicates(list=list1); writeOutput(newlist1) </cfscript>

<cfscript> 
  list1 = "1, 2, 22, 3, 2, 5, 5, 1"; 
  newList1 = listgetduplicates(list=list1); 
  writeOutput(newlist1) 
</cfscript>

Output

2,5,1

Example- dashed list

list1 = "1-2-22-3-2-5-5-1";

newList1 = listgetduplicates(list=list1, delimiter="-");

writeOutput(newlist1)

</cfscript>

<cfscript> list1 = "1-2-22-3-2-5-5-1"; newList1 = listgetduplicates(list=list1, delimiter="-"); writeOutput(newlist1) </cfscript>

<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

list1 = "one,one,ONE,two,three,,,four,THREE,FOUR,FIVE,";

newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=true,includeemptyfields=true);

writeOutput(newlist1)

</cfscript>

<cfscript> list1 = "one,one,ONE,two,three,,,four,THREE,FOUR,FIVE,"; newList1 = listgetduplicates(list=list1,delimiter=",",ignorecase=true,includeemptyfields=true); writeOutput(newlist1) </cfscript>

<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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New user?

ListGetDuplicates

Description

Returns

Category

Syntax

See also

History

Parameters

Example

Example ignoreCase=FALSE

Example- numeric list

Example- dashed list

Example- includeemptyfields=true

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