lazy-loading

How do you lazy load a NSMutableArray in tableView:didSelectRowAtIndexPath: ? I am very new to Objective-C, XCode, and iOS programming, so any help is appreciated. Lazy load means 'loading on demand'. So you perform operation only when it is really necessary, and not beforehand. Say we have method: -(void) init { self = [super init]; mMyMemberArray = [self loadSomeDataToArray]; } -(void) tableView:didSelectRowAtIndexPath: { [someObject processData: mMyMemberArray]; } This is not lazy loading cause we've loaded data beforehand. But this: -(void) tableView:didSelectRowAtIndexPath: { someObject

I am creating the db connection like so: protected override void OnConfiguring(DbContextOptionsBuilder optionbuilder) { optionbuilder.UseLazyLoadingProxies().UseSqlite(@"Data Source=Data.db"); } And I am trying to access an object like so: public static User GetProfile(int uid) { using (Db db = new Db()) { return db.Users.Include(x => x.Settings).FirstOrDefault(x => x.UserId == uid); } } The user object is as follows: public class User { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int UserId { get; set; } public string Name { get; set; } public DateTime? LastUsed{ get;

I understand that this is highly specific to the concrete application, but I'm just wondering what's the general opinion, or at least some personal experiences on the issue. I have an aversion towards the 'open session in view' pattern, so to avoid it, I'm thinking about simply fetching everything small eagerly, and using queries in the service layer to fetch larger stuff. Has anyone used this and regretted it? And is there maybe some elegant solution to lazy loading in the view layer that I'm not aware of? Lazy loading is only beneficial if you aren't going to use the data in question at all

What I want to do is something like the following (All object class have a common interface): MyDict.Add("A", MyAObjectClass); // Not an instance MyDict.Add("B", MyBObjectClass); MyDict.Add("C", MyCOjbectClass); String typeIwant = "B"; // Could be passed to a function or something MyCommonInterface myobject = MyDict[typeIwant](); How could I program something like this? The purpose of this is to not have to create instances of every single type I will store in my dictionary (could be quite a bit of them) and instead only instance the one I'm actually going to use. You can store type