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Android SQLite DB When to Close

I am working with a SQLite database on android. My database manager is a singleton and right now opens a connection to the database when it is initialized. It is safe to leave the database open the entire time so that when someone calls my class to work with the database it is already open? Or shoul...
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What's the magic of “-” (a dash) in command-line parameters?

...commands that want to use a file. It allows you to specify standard input or output rather than an actual file name. That's the case for your first and third example. For example, the cdrecord command is taking standard input (the ISO image stream produced by mkisofs) and writing it directly to /d...
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How to sort in-place using the merge sort algorithm?

...th left this as an exercise (Vol 3, 5.2.5). There do exist in-place merge sorts. They must be implemented carefully. First, naive in-place merge such as described here isn't the right solution. It downgrades the performance to O(N2). The idea is to sort part of the array while using the rest as wo...
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jQuery hasClass() - check for more than one class

... No, because that would look for elements that have both classes. I think Marcel is looking for elements with one or more of a number of classes. – Giles Van Gruisen Feb 6 '10 at 22:19 ...
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PHP cURL HTTP CODE return 0

...when I change $html_brand into a broken url. Is there anything that I miss or do not know of? Thanks. 9 Answers ...
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jQuery - If element has class do this

... animate. If the problem is with the animation itself, we'd need to know more about your element positioning (absolute? absolute inside relative parent? does the parent have layout?) share | improv...
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Private virtual method in C++

...This lets the derived classes override the function to customize the behavior as needed, without further exposing the virtual functions directly by making them callable by derived classes (as would be possible if the functions were just protected). The point is that virtual functions exist to allow ...
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When should I use std::thread::detach?

... In the destructor of std::thread, std::terminate is called if: the thread was not joined (with t.join()) and was not detached either (with t.detach()) Thus, you should always either join or detach a thread before the flows of execution ...
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How to change a PG column to NULLABLE TRUE?

... accomplish this using Postgres? I've tried the code below but it doesn't work: 1 Answer ...
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$routeParams doesn't work in resolve function

... Thank you! Why do I need $routeParams then? – fedor.belov Nov 17 '12 at 18:32 2 I guess that ...