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Concurrent vs serial queues in GCD

...ling to fully understand the concurrent and serial queues in GCD. I have some issues and hoping someone can answer me clearly and at the point. ...
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Table fixed header and scrollable body

.... Unfortunately the solutions I have found does not work with bootstrap or mess up the style. 29 Answers ...
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Nodejs Event Loop

...C++ modules [ when they are running in a main thread ( as per official documentation node.js itself is single threaded) ]. When outside of the main thread, libev and libeio handle it in the thread pool and libev provide the interaction with the main loop. So from my understanding, node.js has 1 perm...
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The definitive guide to form-based website authentication [closed]

...ased authentication for websites" should be a fine topic for such an experiment. 12 Answers ...
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Entity Framework: One Database, Multiple DbContexts. Is this a bad idea? [closed]

My impression to date has been that a DbContext is meant to represent your database, and thus, if your application uses one database, you'd want only one DbContext . ...
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What are the advantages of using a schema-free database like MongoDB compared to a relational databa

...ng relational databases like MySQL or PostgreSQL, and combined with MVC frameworks such as Symfony, RoR or Django, and I think it works great. ...
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python: How do I know what type of exception occurred?

... ways. If you just want the exception object, do it like this: try: someFunction() except Exception as ex: template = "An exception of type {0} occurred. Arguments:\n{1!r}" message = template.format(type(ex).__name__, ex.args) print message Make sure message is brought to the atte...
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Why doesn't Java allow generic subclasses of Throwable?

...are not reifiable, which is a problem in the following case: try { doSomeStuff(); } catch (SomeException<Integer> e) { // ignore that } catch (SomeException<String> e) { crashAndBurn() } Both SomeException<Integer> and SomeException<String> are erased to the same ...
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How does password salt help against a rainbow table attack?

I'm having some trouble understanding the purpose of a salt to a password. It's my understanding that the primary use is to hamper a rainbow table attack. However, the methods I've seen to implement this don't seem to really make the problem harder. ...
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How to restore to a different database in sql server?

...ekly in the scheduler and I get a .bak file. Now I want to fiddle with some data so I need to restore it to a different database - Database2 . ...