ArrayCollection sort function.

ArrayCollectionSort.as

package classes.utils 
{ 
    import mx.collections.ArrayCollection; 
    import mx.collections.Sort; 
    import mx.collections.SortField; 
    
    /** 
     * Useful functions to manipulate arrays 
     * 
     * @author Cyril Mazur cyrilmazur.com 
     */ 
    public class ArrayUtils
    { 
        /** 
         * Sort an arrayCollection by key 
         * order MUST be either "ASC" or "DESC" 
         * 
         * @author Cyril Mazur cyrilmazur.com 
         * @see http://blog.flexexamples.com/2007/08/05/sorting-an-arraycollection-using-the-sortfield-and-sort-classes/ 
         * 
         * @param ArrayCollection arrayCollection 
         * @param String sortBy 
         * @param Boolean descending 
         * @param Boolean numericSort 
         * 
         * @return ArrayCollection 
         */ 
        public static function sort(arrayCollection:ArrayCollection, sortBy:String, descending:Boolean=false, numericSort:Boolean=true):ArrayCollection
        { 
            /* Create the sort field and fill it */ 
            var dataSortField:SortField = new SortField(); 
            dataSortField.name = sortBy; 
            dataSortField.caseInsensitive = true; 
            dataSortField.numeric = numericSort; 
            
            /* Set the order, by default it's ascending */ 
            dataSortField.descending = true; 
            
            /* Create the Sort object and add the SortField object 
            created earlier to the array of fields to sort on. */ 
            var dataSort:Sort = new Sort(); 
            dataSort.fields = [dataSortField]; 
            
            /* Set the ArrayCollection object's sort property to our 
            custom sort, and refresh the ArrayCollection. */ 
            arrayCollection.sort = dataSort; 
            arrayCollection.refresh(); 
            
            /* Return the collection */ 
            return arrayCollection; 
        } 
    }
}