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Why is the use of alloca() not considered good practice?

alloca() allocates memory on the stack rather than on the heap, as in the case of malloc() . So, when I return from the routine the memory is freed. So, actually this solves my problem of freeing up dynamically allocated memory. Freeing of memory allocated through malloc() is a major headache an...
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Automate ssh-keygen -t rsa so it does not ask for a passphrase

I need to automate ssh-keygen -t rsa with out a password i.e. enter at the prompt. How can I do that from a shell script? ...
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How to create a backup of a single table in a postgres database?

Is there a way to create a backup of a single table within a database using postgres? And how? Does this also work with the pg_dump command? ...
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Find out what process registered a global hotkey? (Windows API)

As far as I've been able to find out, Windows doesn't offer an API function to tell what application has registered a global hotkey (via RegisterHotkey). I can only find out that a hotkey is registered if RegisterHotkey returns false, but not who "owns" the hotkey. ...
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Why does C# not provide the C++ style 'friend' keyword? [closed]

The C++ friend keyword allows a class A to designate class B as its friend. This allows Class B to access the private / protected members of class A . ...
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get the latest fragment in backstack

How can I get the latest fragment instance added in backstack (if I do not know the fragment tag & id)? 17 Answers ...
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Default parameters with C++ constructors [closed]

Is it good practice to have a class constructor that uses default parameters, or should I use separate overloaded constructors? For example: ...
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How do you configure Django for simple development and deployment?

I tend to use SQLite when doing Django development, but on a live server something more robust is often needed ( MySQL / PostgreSQL , for example). Invariably, there are other changes to make to the Django settings as well: different logging locations / intensities, media paths, etc. ...
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node.js database [closed]

I'm looking for a database to pair with a node.js app. I'm assuming a json/nosql db would be preferable to a relational DB [I can do without any json/sql impedance mismatch]. I'm considering: ...
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How to use BigInteger?

I have this piece of code, which is not working: 9 Answers 9 ...