Filtering an MX DataGrid control by date range using Flex

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2010/02/01/filtering-an-mx-datagrid-control-by-date-range-using-flex/ -->
<mx:Application name="MX_DataGrid_filter_DateField_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white"
        initialize="init();">
 
    <mx:Script>
        <![CDATA[
            protected const MIN_DATE:Date = new Date(2010, 0, 1);
            protected const MAX_DATE:Date = new Date(2010, 11, 31);
 
            protected function date_labelFunc(item:Object, col:DataGridColumn):String {
                var time:Number = Date.parse(item[col.dataField]);
                return new Date(time).toDateString();
            }
 
            protected function arrColl_filterFunc(item:Object):Boolean {
                var cDate:Number = Date.parse(item.holidayDate);
 
                if (!sDate || !eDate) {
                    return true;
                }
 
                if (sDate.selectedDate && eDate.selectedDate) {
                    return (sDate.selectedDate.time <= cDate) && (eDate.selectedDate.time >= cDate);
                } else if (sDate.selectedDate) {
                    return sDate.selectedDate.time <= cDate;
                } else if (eDate.selectedDate) {
                    return eDate.selectedDate.time >= cDate;
                } else {
                    return true;
                }
            }
 
            protected function init():void {
                sDate.selectedDate = MIN_DATE;
                sDate.selectableRange = {rangeStart:MIN_DATE, rangeEnd:MAX_DATE};
 
                eDate.selectedDate = MAX_DATE;
                eDate.selectableRange = sDate.selectableRange;
            }
        ]]>
    </mx:Script>
 
    <mx:ArrayCollection id="arrColl" filterFunction="arrColl_filterFunc">
        <mx:source>
            <mx:Array>
                <mx:Object holidayName="New Years" holidayDate="2010/1/1" />
                <mx:Object holidayName="Martin Luther King, Jr. Day" holidayDate="2010/1/18" />
 
                <mx:Object holidayName="Groundhog Day" holidayDate="2010/2/2" />
                <mx:Object holidayName="Chinese New Year" holidayDate="2010/2/14" />
                <mx:Object holidayName="Valentine's Day" holidayDate="2010/2/14" />
                <mx:Object holidayName="President's Day" holidayDate="2010/2/15" />
                <mx:Object holidayName="Ash Wednesday" holidayDate="2010/2/17" />
 
                <mx:Object holidayName="Daylight Saving Time starts" holidayDate="2010/3/14" />
                <mx:Object holidayName="St. Patrick's Day" holidayDate="2010/3/17" />
                <mx:Object holidayName="First Day of Spring" holidayDate="2010/3/20" />
 
                <mx:Object holidayName="April Fool's Day" holidayDate="2010/4/1" />
                <mx:Object holidayName="Easter" holidayDate="2010/4/4" />
                <mx:Object holidayName="Administrative Professional's Day" holidayDate="2010/4/21" />
                <mx:Object holidayName="Earth Day" holidayDate="2010/4/22" />
 
                <mx:Object holidayName="Cinco De Mayo" holidayDate="2010/5/5" />
                <mx:Object holidayName="Mothers Day" holidayDate="2010/5/9" />
                <mx:Object holidayName="Armed Forces Day" holidayDate="2010/5/15" />
                <mx:Object holidayName="Memorial Day" holidayDate="2010/5/31" />
 
                <mx:Object holidayName="Flag Day" holidayDate="2010/6/14" />
                <mx:Object holidayName="Father's Day" holidayDate="2010/6/20" />
                <mx:Object holidayName="Summer Begins" holidayDate="2010/6/21" />
 
                <mx:Object holidayName="Independence Day/July 4th" holidayDate="2010/7/4" />
 
                <mx:Object holidayName="Labor Day" holidayDate="2010/9/6" />
                <mx:Object holidayName="Grandparents Day" holidayDate="2010/9/12" />
                <mx:Object holidayName="First Day of Autumn" holidayDate="2010/9/23" />
 
                <mx:Object holidayName="Columbus Day" holidayDate="2010/10/11" />
                <mx:Object holidayName="United Nations Day" holidayDate="2010/10/24" />
                <mx:Object holidayName="Halloween" holidayDate="2010/10/31" />
 
                <mx:Object holidayName="All Saints' Day" holidayDate="2010/11/1" />
                <mx:Object holidayName="Daylight Saving Time Ends" holidayDate="2010/11/7" />
                <mx:Object holidayName="Veteran's Day" holidayDate="2010/11/11" />
                <mx:Object holidayName="Thanksgiving" holidayDate="2010/11/25" />
 
                <mx:Object holidayName="Wright Brothers Day" holidayDate="2010/12/17" />
                <mx:Object holidayName="First Day Winter" holidayDate="2010/12/21" />
                <mx:Object holidayName="Christmas" holidayDate="2010/12/25" />
                <mx:Object holidayName="New Years Eve" holidayDate="2010/12/31" />
            </mx:Array>
        </mx:source>
    </mx:ArrayCollection>
 
    <mx:ApplicationControlBar dock="true">
        <mx:Form>
            <mx:FormItem label="Start date:">
                <mx:DateField id="sDate" change="arrColl.refresh();" />
            </mx:FormItem>
            <mx:FormItem label="End date:">
                <mx:DateField id="eDate" change="arrColl.refresh();" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>
 
    <mx:DataGrid id="dGrid" dataProvider="{arrColl}" width="400">
        <mx:columns>
            <mx:DataGridColumn dataField="holidayName" />
            <mx:DataGridColumn dataField="holidayDate" labelFunction="date_labelFunc" />
        </mx:columns>
    </mx:DataGrid>
 
</mx:Application>