CFLib.org – deDupeArray

deDupeArray(inputArray)

Last updated April 26, 2012

author

Version: 1 | Requires: ColdFusion 9 | Library: CFMLLib

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Description:
I saw a function here for removing dupes from lists and queries, but not one for arrays. Here's one I've been using for a while.

Return Values:
Returns an array.

Example:

view plain print about

myArray = ["1","2","1","3","1","4"];
myArray = deDupeArray(myArray);

result: ["1","2","3","4"]

myArray = ["1","2","1","3","1","4"];
myArray = deDupeArray(myArray);

result: ["1","2","3","4"]

Parameters:

Name	Description	Required
inputArray	Array to dedupe.	Yes

Full UDF Source:

	
	
			
			
			
				
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				ColdFISH is developed by Jason Delmore.  Source code and license information available at coldfish.riaforge.org.  Version 3.1.1
				
			<cfscript>
/**
 * Removes duplicate values from an array.
 * 
 * @param inputArray 	 Array to dedupe. (Required)
 * @return Returns an array. 
 * @author Dave Anderson (&#116;&#104;&#101;&#46;&#111;&#110;&#101;&#46;&#116;&#114;&#117;&#101;&#46;&#100;&#97;&#118;&#101;&#46;&#97;&#110;&#100;&#101;&#114;&#115;&#111;&#110;&#64;&#103;&#109;&#97;&#105;&#108;&#46;&#99;&#111;&#109;) 
 * @version 1, April 26, 2012 
 */
public array function deDupeArray(required array inputArray) {
	local.arrList = arrayToList(inputArray);
	local.retArr = inputArray;
	for (local.i = arrayLen(inputArray);i gte 1;i=i-1) {
		if (listValueCountNoCase(arrList,inputArray[i]) gt 1) {
			arrayDeleteAt(retArr,i);
			arrList = arrayToList(retArr);
		}
	}
	return retArr;
}
</cfscript>
		<cfscript>
/**
 * Removes duplicate values from an array.
 * 
 * @param inputArray      Array to dedupe. (Required)
 * @return Returns an array. 
 * @author Dave Anderson (the.one.true.dave.anderson@gmail.com) 
 * @version 1, April 26, 2012 
 */
public array function deDupeArray(required array inputArray) {
    local.arrList = arrayToList(inputArray);
    local.retArr = inputArray;
    for (local.i = arrayLen(inputArray);i gte 1;i=i-1) {
        if (listValueCountNoCase(arrList,inputArray[i]) gt 1) {
            arrayDeleteAt(retArr,i);
            arrList = arrayToList(retArr);
        }
    }
    return retArr;
}
</cfscript>