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How to create GUID / UUID?
... be of the form "xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx", where x is one of [0-9, a-f] M is one of [1-5], and N is [8, 9, a, or b]
Use of a low-quality source of randomness (such as Math.random)
Thus, developers writing code for production environments are encouraged to use a rigorous, well-maintain...
Pick a random element from an array
...]
print(array.randomElement()!) // Using ! knowing I have array.count > 0
If you don't create the array and aren't guaranteed count > 0, you should do something like:
if let randomElement = array.randomElement() {
print(randomElement)
}
Swift 4.1 and below
Just to answer your questi...
Bash Script: count unique lines in file
...
306
You can use the uniq command to get counts of sorted repeated lines:
sort ips.txt | uniq -c
...
Determine function name from within that function (without using traceback)
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208
Python doesn't have a feature to access the function or its name within the function itself. It...
initialize a vector to zeros C++/C++11
...eed initialization lists for that:
std::vector<int> vector1(length, 0);
std::vector<double> vector2(length, 0.0);
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Python Dictionary to URL Parameters
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edited Apr 6 '16 at 5:09
xiº
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answered Aug 5...
Suppress command line output
...dout is file descriptor 1, and stderr is file descriptor 2 by convention. (0 is stdin, incidentally.) The 2>&1 copies output file descriptor 2 from the new value of 1, which was just redirected to the null device.
This syntax is (loosely) borrowed from many Unix shells, but you do have to be...
Calculating distance between two points, using latitude longitude?
... height difference. If you are not interested in height
* difference pass 0.0. Uses Haversine method as its base.
*
* lat1, lon1 Start point lat2, lon2 End point el1 Start altitude in meters
* el2 End altitude in meters
* @returns Distance in Meters
*/
public static double distance(double lat...
How do I set a cookie on HttpClient's HttpRequestMessage
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Todd Menier
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answered Sep 11 '12 at 16:57
Darin Dimit...
What is the “__v” field in Mongoose
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edited Dec 14 '16 at 11:04
Pierre
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answered Sep 1...