Unanswered Questions
28
votes
0answers
2k views
Why (or why not) are existential types considered bad practice in functional programming?
What are some techniques I might use to consistently refactor code removing the reliance on existential types? Typically these are used to disqualify undesired constructions of your type as well as to ...
11
votes
0answers
450 views
How to implement a branch-and-bound in a functional programming language?
I am trying to write a branch and bound search on the set of all functions f: D -> R, where the domain size is small (|D| ~ 20) and the range is much bigger (|R| ~ 2^20). Initially, I came up with the ...
7
votes
0answers
268 views
Does the games industry use automated testing for visual parts of games/rendering? How?
Some parts of a game are easy to test in an automated way (logic, maths, input handling); but there's also a lot that's purely visual and not easily testable.
I would be surprised if the games ...
7
votes
0answers
197 views
Using uniqueness types to implement safe parallelism
I've been interested in uniqueness types as an alternative to monads in pure functional languages for some time; unfortunately, this is kind of an esoteric area of CS research and online resources ...
7
votes
1answer
951 views
Useful design patterns for working with FragmentManager on Android
When working with fragments, I have been using a class composed of static methods that define actions on fragments. For any given project, I might have a class called FragmentActions, which contains ...
6
votes
1answer
80 views
In ASP.NET MVC, should the view models have an ID?
When developing an ASP.NET MVC application that allows the model to be updated, you need some way to know how to take the updated view model and match it back to the model that is now updated. There ...
5
votes
1answer
718 views
Attachment handling for web application with Jackrabbit
I need to manage attachments on my Spring web application and I thought to use an open source repository.
My app it's a job approval system using J2EE / SPRING 3 Framework and Postgress DB to allow ...
4
votes
0answers
77 views
When we say a monad 'encapsulates a computation' - is this just saying 'wraps a functional transformation of data'?
When I think of the word 'computation' - my mind jumps to lambda calculus or operations on a state machine representing a CPU. It is quite a broad definition.
Now some people talk about monads as ...
4
votes
1answer
123 views
Is it possible to programmatically attach custom metadata to phone calls?
I'm trying to determine if it should be possible for a cell phone app to relay custom data along with a phone call. By "should be possible" I mean that I'm not trying to learn how to do it in ...
4
votes
0answers
114 views
How do browsers paint a render tree to the screen?
I'm interested in building a browser-like rendering engine. I understand a bit about how OpenGL and GUI toolkits work. But how do browsers actually put pixels on the screen? Are they like software ...
4
votes
2answers
160 views
Reducing dependency cycles and reducing coupling
I'm trying to learn how to produce quality object-oriented code and have been studying concepts like SOLID. I'm currently working on an entity-component-process system for a small game engine.
...
4
votes
0answers
257 views
Why does the new ADT create a static inner class Fragment by default?
Honestly, I can't help but feel that this is done merely to confuse newcomers. Most of the errors on Stack Overflow by complete Android newbies mostly stem from that they have a static inner class ...
4
votes
0answers
140 views
How to represent hard-to-calculate “properties” of “objects” in functional code?
I have a polyline "class" in my Clojure program, which is represented by a vector of points. (It's not really a class or anything.)
The polyline's length (in the geometric sense) is something that is ...
4
votes
1answer
1k views
Design Pattern for Data Validation
What would be the best design pattern for this problem:
I have an Object A. Object A can either be registered or deleted from the database depending on the user request.
Data validation is performed ...
4
votes
1answer
3k views
using dbus on Android
I would like to know if it is possible to use DBUS on Android using Java. From what I have been searching till now it appears like there is no DBUS programming support on Android. But then bluetooth ...
