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What is the AppDelegate for and how do I know when to use it?
I'm just beginning to work on iPhone apps. How do I know when I should be putting stuff in AppDelegate versus a custom class? Is there a rule or any type of analogy with another programming language like Python or PHP that uses an AppDelegate like pattern?
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How do I ZIP a file in C#, using no 3rd-party APIs?
... a file list because it wants a MIME type for each file you add. It might do what you want.
I'm currently using these classes for a similar problem to archive several related files into a single file for download. We use a file extension to associate the download file with our desktop app. One s...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
... for performance.
Like all such performance optimisations you should only do it after extensive profiling to ensure the code really is in a bottleneck, and probably given the micro nature, that it is being run in a tight loop. Generally the Linux developers are pretty experienced so I would imagine...
Is there a difference between copy initialization and direct initialization?
...ally created, called "temporary materialization", because A_factory_func() doesn't have a variable or reference that otherwise would require an object to exist).
As examples in our case, in the case of a1 and a2 special rules say that in such declarations, the result object of a prvalue initializer...
How to avoid explicit 'self' in Python?
...to useful properties, such as: you can't add members which accidentally shadow non-members and thereby break code.
One extreme example: you can write a class without any knowledge of what base classes it might have, and always know whether you are accessing a member or not:
class A(some_function()...
How to do a less than or equal to filter in Django queryset?
...se, lt for less than and gt for greater than. You can find them all in the documentation.
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How do malloc() and free() work?
... too can be understood better).
In many malloc/free implementations, free does normally not return the memory to the operating system (or at least only in rare cases). The reason is that you will get gaps in your heap and thus it can happen, that you just finish off your 2 or 4 GB of virtual memory...
Android ACTION_IMAGE_CAPTURE Intent
...til you try to hit the "Ok" button in the camera app. The "Ok" button just does nothing. The camera app stays open and nothing locks up. We can cancel out of it, but the file never gets written. What exactly do we have to do to get ACTION_IMAGE_CAPTURE to write the picture taken to a file?
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finding and replacing elements in a list
...So far my attempts in code are getting me nowhere, what is the best way to do this?
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find -exec with multiple commands
I am trying to use find -exec with multiple commands without any success. Does anybody know if commands such as the following are possible?
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