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9
votes
6answers
2k views

Merits of a “Message Passing” system vs. an “Event Based” system

My question is coming from an somewhat uneducated perspective. What are the relative merits of a "message passing" system vs an "event based" system. Why would one choose one over the other? What ...
4
votes
4answers
195 views

Design pattern for bidirectional signals/events

This problem feels rather basic, yet I've never known a great solution. I'm looking for a way for components in an application to notify each other while being as decoupled as possible (both at ...
2
votes
1answer
170 views

Objective C - nested messages … confusion about

Wonder if anyone could shed some light on this messaging construct: The documentation says that messages appear btwn brackets [] and that the msg target/object is on the left, whilst the msg itself ...
2
votes
1answer
231 views

UI message passing programming paradigm

I recently (about two months ago) read an article that explained some user interface paradigm that I can't remember the name of and I also can't find the article anymore. The paradigm allows for ...
1
vote
1answer
413 views

How to implement session state in a backend web application?

When using a non-MVC service-oriented/Interactor pattern approach to decoupled system architecture, how is session state implemented? I've been thinking of building the frontend of an application ...
0
votes
4answers
467 views

Objective-C message passing related queries

I am learning objective-C after having good knowledge of C/C++. I have 2 questions: Are Obj-C message passing and C++ vtable, two different ways of implementing polymorphism or Are they two very ...
0
votes
1answer
155 views

In objective C, where does the inheritance chain end? [closed]

In objective C, classes are objects, but what object owns the class objects? I am trying to get as detailed an understanding of iOS programming as I can, and this question popped into my head, so I ...