markandrewj

// Universal mongodb reduce function for complex objects
// 
// Example:
//    
//    emit({ total_views: 3, page_type: {home: 1, product: 2}, site_id: [1] })
//    emit({total_views: 5, page_type: {home: 1, collection: 4}, site_id: [2]})
//    
//    -> reduce
//    
//    { total_views: 8, page_type: { home: 2, product: 2, collection: 4 }, site_id: [1,2] }