arrayDiff(smallerArray, biggerArray)
Last updated March 13, 2007
Version: 1 | Requires: ColdFusion 5 | Library: DataManipulationLib
Description:
This function compares 2 one-demensional arrays (a & b) with simple values and returns an array with the values found in one array (a) but not in the other (b).
Return Values:
Returns an array.
Example:
aSmaller = arrayNew(1);
aSmaller[1] = 'a';
aSmaller[2] = 'b';
aBigger = arrayNew(1);
aBigger[1] = 'a';
aBigger[2] = 'c';
aBigger[3] = 'b';
aBigger[4] = 'd';
</cfscript>
Smaller Array:
<cfdump var="#aSmaller#"><br />
Bigger Array:
<cfdump var="#aBigger#"><br />
Difference between the two:
<cfset aDifferences = arrayDiff(aSmaller,aBigger)>
<Ccfdump var="#aDifferences#">
Parameters:
| Name | Description | Required |
|---|---|---|
| smallerArray | First array. | Yes |
| biggerArray | Second array. | Yes |
Full UDF Source:
<cfscript>
/**
* Compares two arrays (with simple values) and returns the difference between the two.
*
* @param smallerArray First array. (Required)
* @param biggerArray Second array. (Required)
* @return Returns an array.
* @author Greg Nettles (gregnettles@gmail.com)
* @version 1, March 13, 2007
*/
function arrayDiff(smallerArray,biggerArray) {
var i = "";
var result = arrayNew(1);
var s = arrayToList(arguments.smallerArray);
for (i=1;i lte arrayLen(arguments.biggerArray); i=i+1) if (listFind(s, arguments.biggerArray[i]) is 0) arrayAppend(result, arguments.biggerArray[i]);
return result;
}
</cfscript>
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