ListRemoveDuplicates

Last updated on May 30, 2024 | Also applies to ColdFusion

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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
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    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
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    22. cfxml
  8. File management tags
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Cloud services

Description

Removes duplicate values (if they exist) in a list.

Returns

List sans duplicate values

History

ColdFusion 10: Added this function

Syntax

ListRemoveDuplicates(list[, delimiter] [, ignoreCase])

ListRemoveDuplicates(list[, delimiter] [, ignoreCase])

Properties

Parameter	Description
list	Required. List of objects.
delimiter	Optional. Character(s) that separate list elements. The default value is comma. .
ignoreCase	Optional. If true, ignores the case of strings in the list. By default the value is set to false.

Example 1

myList = "one,two,three,four,five,one,five,three"

newList = listRemoveDuplicates(myList);

//default delimeter is ","

//newList contains "one,two,three,four,five"

writeOutput(newList)

</cfscript>

<cfscript> myList = "one,two,three,four,five,one,five,three" newList = listRemoveDuplicates(myList); //default delimeter is "," //newList contains "one,two,three,four,five" writeOutput(newList) </cfscript>

<cfscript> 
    myList = "one,two,three,four,five,one,five,three"
    newList = listRemoveDuplicates(myList); 
    //default delimeter is ","
    //newList contains "one,two,three,four,five"
    writeOutput(newList)
</cfscript>

Output

one,two,three,four,five

Example 2

myList = "one,two,three,four,five,ONE,TWO,THREE"

newList = listRemoveDuplicates(myList, ",", true);

//newList contains "one,two,three,four,five"

writeOutput(newList)

</cfscript>

<cfscript> myList = "one,two,three,four,five,ONE,TWO,THREE" newList = listRemoveDuplicates(myList, ",", true); //newList contains "one,two,three,four,five" writeOutput(newList) </cfscript>

<cfscript> 
    myList = "one,two,three,four,five,ONE,TWO,THREE"
    newList = listRemoveDuplicates(myList, ",", true); 
    //newList contains "one,two,three,four,five"
    writeOutput(newList)
</cfscript>

Output

one,two,three,four,five

Example 3

myList="London,Auckland,Seattle,Geneva,Berlin,Berlin,Rome,London,Seattle";

myList1="London,Auckland,Seattle,Geneva,Berlin,Berlin,Rome,London,Seattle,seattle,auckLand";

myCleanList=ListRemoveDuplicates(myList);

myCleanList1=ListRemoveDuplicates(myList1,",",false);

WriteOutput(myCleanList & " | "); // Removes duplicate items in the list

WriteOutput(myCleanList1); // Removes duplicate items after ignoring case

</cfscript>

<cfscript> myList="London,Auckland,Seattle,Geneva,Berlin,Berlin,Rome,London,Seattle"; myList1="London,Auckland,Seattle,Geneva,Berlin,Berlin,Rome,London,Seattle,seattle,auckLand"; myCleanList=ListRemoveDuplicates(myList); myCleanList1=ListRemoveDuplicates(myList1,",",false); WriteOutput(myCleanList & " | "); // Removes duplicate items in the list WriteOutput(myCleanList1); // Removes duplicate items after ignoring case </cfscript>

<cfscript>
       myList="London,Auckland,Seattle,Geneva,Berlin,Berlin,Rome,London,Seattle";
       myList1="London,Auckland,Seattle,Geneva,Berlin,Berlin,Rome,London,Seattle,seattle,auckLand";
       myCleanList=ListRemoveDuplicates(myList);
       myCleanList1=ListRemoveDuplicates(myList1,",",false);
       WriteOutput(myCleanList & " | "); // Removes duplicate items in the list
       WriteOutput(myCleanList1); // Removes duplicate items after ignoring case
</cfscript>

Output

London,Auckland,Seattle,Geneva,Berlin,Rome | London,Auckland,Seattle,Geneva,Berlin,Rome,seattle,auckLand

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ListRemoveDuplicates

Description

Returns

History

Syntax

Properties

Example 1

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