design-patterns

问题 I have already looked at How to wait for a transition to end in javafx 2.1? but it doesn't quite solve my problem. I have a List of ImageView objects, and I want to iterate through this List and perform the following actions on each 'slide' of the List: fade in stay for a few seconds fade out I have the following code in place but since the transition is asynchronous, the loop applies the transition to all the 'slides' at the same time: // The method I am running in my class public void start

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Hey--I'm trying to design my first game using the Pygame library for Python, and I was wondering what the best practices are for level design in general. I would love to hear what you guys think are good object oriented design patterns for managing levels. Also, I'm fairly new to Python--thanks! 回答1: With this type of game your maps are in terms of tiles (I'm assuming that by level you mean an individual level, not managing all of your levels). Each tile has an associated picture (what it

问题 Following on from this question I am looking at building a similar notification system and I have a question (which has an obvious answer I think but I'd prefer to have some other opinions): If a particular post generated a million likes, and then someone adds a comment to that post, I would need to notify those million people who liked the post about the comment that was added. Is the only way to achieve this to write a million rows into a NotificationRead table which has the NotificationID

问题 Following on from this question I am looking at building a similar notification system and I have a question (which has an obvious answer I think but I'd prefer to have some other opinions): If a particular post generated a million likes, and then someone adds a comment to that post, I would need to notify those million people who liked the post about the comment that was added. Is the only way to achieve this to write a million rows into a NotificationRead table which has the NotificationID

问题 When asking questions about implicits a common suggestion / recommendation / advice that is given together with the answer (or sometimes that is the answer itself) is to use implicit vals with excplicit type signatures instead of using implicit objects . But, what is the reason behind that? 回答1: "TL;DR;" The reason is that an implici val with an explicit type signature has the exact type you want whereas an implicit object has a different type. The best way to show why that could be a problem

问题 When asking questions about implicits a common suggestion / recommendation / advice that is given together with the answer (or sometimes that is the answer itself) is to use implicit vals with excplicit type signatures instead of using implicit objects . But, what is the reason behind that? 回答1: "TL;DR;" The reason is that an implici val with an explicit type signature has the exact type you want whereas an implicit object has a different type. The best way to show why that could be a problem

问题 Both Two-way Adapter and Pluggable Adapter can access both the classes and also change the behavior of the method which is required to be changed. The following is my code: Two-Way Adapter public interface IAircraft { bool Airborne { get; } void TakeOff(); int Height { get; } } // Target public sealed class Aircraft : IAircraft { int height; bool airborne; public Aircraft() { height = 0; airborne = false; } public void TakeOff() { Console.WriteLine("Aircraft engine takeoff"); airborne = true;