CFLib.org – Common Function Library Project

Description:
This function will return the item with the most occurances in a list.

Return Values:
Returns a string.

Example:

<cfset list = "A1,A2,A3,A1,A3,A1,A2,A1,A1">
<cfset temp = listFindMaxOccurance(list)>
<cfdump var="#temp#">

Parameters:

Full UDF Source:

/**
 * This function will return the item with the most occurances in a list.
 * V2 by Raymond Camden
 * 
 * @param list      The list to check. (Required)
 * @param delim      List delimiter. Defaults to a comma. (Optional)
 * @return Returns a string. 
 * @author Qasim Rasheed (qasimrasheed@hotmail.com) 
 * @version 2, February 23, 2005 
 */
function listFindMaxOccurance(list){
    var i = "";
    var delim = ",";
    var maxitem = "";
    var maxcount = 0;
    var thisItem = "";
    if(arrayLen(arguments) gte 2) delim = arguments[2];
        
    for(i=1;i lte listLen(list,delim );i=i+1) {
        thisItem = listGetAt(list,i,delim);
        if(listValueCount(list,thisItem,delim) gt maxcount) {
            maxcount = listValueCount(list,thisItem,delim);
            maxitem = thisItem;
        }
    }
    return maxitem;
}