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Why does substring slicing with index out of range work?
...xample'[3:4] and 'example'[3] are fundamentally different, and slicing outside the bounds of a sequence (at least for built-ins) doesn't cause an error.
It might be surprising at first, but it makes sense when you think about it. Indexing returns a single item, but slicing returns a subsequence of...
Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
... x ## y
#define TOKENPASTE2(x, y) TOKENPASTE(x, y)
#define UNIQUE static void TOKENPASTE2(Unique_, __LINE__)(void) {}
Then, __LINE__ gets expanded to the line number during the expansion of UNIQUE (since it's not involved with either # or ##), and then the token pasting happens during the expansio...
Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
...e and complex. It can also handle property placeholders, and a lot more besides.
Both are valid, and neither is deprecated.
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Can I incorporate both SignalR and a RESTful API?
...push based, using the SignalR library. This really sped up the page considerably and reduced a lot of the server calls from the page.
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What is the minimum length of a valid international phone number?
I need to validate user input of an international phone number. According to E.164 , the maximum length is 15 digits, but I was unable to find any information about the minimum. I consider digits only, no plus sign or separators.
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Difference between -pthread and -lpthread while compiling
...revious comments. I don't care at all about what happens if you don't provide -lpthread or some random other proprietary options. Only -lpthread is specified by POSIX to guarantee pthreads and that doesn't seems to be sufficient with gcc.
– fuz
Mar 8 '18 at 1...
Docker - a way to give access to a host USB or serial device?
Last time I checked, Docker didn't have any means to give container access to host serial or USB port . Is there a trick which allows doing that?
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Streaming via RTSP or RTP in HTML5
...s i was already using and this HLS plugin makes the live channel with m3u8 file work for most of urls, if not all.
– Dheeraj Thedijje
Sep 30 '16 at 9:37
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Init method in Spring Controller (annotation version)
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You can use
@PostConstruct
public void init() {
// ...
}
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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
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@NicNilov no dw I did think that though I just wanted to double check :)
– Mark
Dec 28 '17 at 20:04
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