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How do I get the path of the current executed file in Python?
...e not so small... might be a load immediate or something even faster for 0 vs a load global for _?) Debatable whether it's cleaner or easier to read or even more clever/obscure.
– ArtOfWarfare
Dec 22 '17 at 22:19
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Purpose of Trigraph sequences in C++?
...rt (IBM's for example). Microsoft started supporting a warning (C4837) in VS2008 that must be explicitly enabled (using -Wall or something).
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What is the difference between String.slice and String.substring?
...erence between substring and slice in Firefox 22. jsperf.com/string-slice-vs-substring
– Rick
Jul 17 '13 at 21:29
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How many double numbers are there between 0.0 and 1.0?
...s (for any "normal" floating point representation of any base and exponent vs fraction lengths) lie between 0.0 and 1.0 (another quarter between 1.0 and infinity, and the remaining half on the negative half of the real axis). Essentially, half the values of the exponent (with a normal bias, halfway...
(Built-in) way in JavaScript to check if a string is a valid number
... latest version of Chrome. See the performance test here: jsperf.com/isnan-vs-typeof/5
– Kevin Jurkowski
Jan 22 '14 at 0:59
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Check if string matches pattern
...where in string. (See also: https://docs.python.org/library/re.html#search-vs-match)
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How do you build a Singleton in Dart?
...are singleton patterns. It's really a question of syntax "new Singleton()" vs "singleton". I find the latter more clear. Dart's factory constructors are useful, but I don't think this is a good use case for them. I also think Dart's lazy initialisation is a great feature, which is underused. Also re...
Insert Update trigger how to determine if insert or update
...is both a common configuration and a specific action to occur on an INSERT vs. UPDATE trigger. In these cases, to create a separate trigger for the UPDATE and the INSERT would become maintenance problem. (i.e. were both triggers updated properly for the necessary common data algorithm fix?)
To th...
Best way to serialize an NSData into a hexadeximal string
.... I profiled this with a 2MB file on my iPhone 5. Time comparison was 0.05 vs 12 seconds. Memory footprint is negligible with this method while the other method grew the heap to 70MBs!
- (NSString *) hexString
{
NSUInteger bytesCount = self.length;
if (bytesCount) {
const char *hexC...
Difference between `npm start` & `node app.js`, when starting app?
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The documentation has been updated. My answer has substantial changes vs the accepted answer: I wanted to reflect documentation is up-to-date, and accepted answer has a few broken links.
Also, I didn't understand when the accepted answer said "it defaults to node server.js". I think the docume...