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Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
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Hopefully the server is configured for keepalive packets on a fairly aggressive basis. This will cause sessions to terminate in a reasonable time if connections are abruptly broken. If that's not configured, if you can log in as a database superuser you can id...
Android Location Providers - GPS or Network Provider?
...ON.
passive –> (CellID, WiFi MACID): A special location provider for
receiving locations without actually initiating a location fix. This
provider can be used to passively receive location updates when other
applications or services request them without actually requesting the
loca...
How to exit pdb and allow program to continue?
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For the extreme cases, nothing beats set_trace = lambda: None. Python org should add a command that just lets you get out of pdb.
– ErezO
Oct 28 '16 at 5:52
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C++11 std::threads vs posix threads
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If you want to run code on many platforms, go for Posix Threads. They are available almost everywhere and are quite mature. On the other hand if you only use Linux/gcc std::thread is perfectly fine - it has a higher abstraction level, a really good interface an...
Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
...f function call in a new thread vs. a normal one is enormous. The overhead for creating a thread to handle a function call is something like 10000 or more times slower than a plain function call. So, if you're issuing a lot of small function calls, a thread pool might be a good idea.
It's quite app...
How to make the tab character 4 spaces instead of 8 spaces in nano?
...r and that worked. This are the only 3 lines I included in the new .nanorc for anyone interested: set nowrap, set tabsize 4 and set tabstospaces
– Alex
Jun 1 '15 at 13:19
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What does extern inline do?
...ll not generate an out-of-line version, but might call one (which you therefore must define in some other compilation unit. The one-definition rule applies, though; the out-of-line version must have the same code as the inline offered here, in case the compiler calls that instead.
static inline will...
Set background color of WPF Textbox in C# code
How can I change the background and foreground colors of a WPF Textbox programmatically in C#?
6 Answers
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Difference between @Before, @BeforeClass, @BeforeEach and @BeforeAll
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The code marked @Before is executed before each test, while @BeforeClass runs once before the entire test fixture. If your test class has ten tests, @Before code will be executed ten times, but @BeforeClass will be executed only once.
In gener...
Best ways to teach a beginner to program? [closed]
...(just (now - then) no month corrections). (simple math, input, output)
Ask for a direction(Up, down, left, right), then tell the user their fate (fall in a hole, find a cake, ect). (Boolean logic)
FizzBuzz, but count once every second. (Loops, timers, and more logic)
Depending on their age some real...