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Why is setTimeout(fn, 0) sometimes useful?
...debase.
See Philip Roberts talk "What the heck is the event loop?" for more thorough explanation.
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Nested defaultdict of defaultdict
...dict(dict))
The reasons why you might prefer this construct are:
It is more explicit than the recursive solution, and therefore likely more understandable to the reader.
This enables the "leaf" of the defaultdict to be something other than a dictionary, e.g.,: defaultdict(lambda: defaultdict(lis...
How to document thrown exceptions in c#/.net
... are the ones you should be documenting and wrapping.
You can find some more guidelines on exception handling here.
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Is it possible to declare two variables of different types in a for loop?
...++11: std::make_pair allows you to do this, as well as std::make_tuple for more than two objects.
for (auto p = std::make_pair(5, std::string("Hello World")); p.first < 10; ++p.first) {
std::cout << p.second << std::endl;
}
std::make_pair will return the two arguments in a std:...
Difference between static and shared libraries?
...bles including types), but implementation-side functionality may differ in more than perf.: e.g. function always logs to file -> also log to TCP server:port expected in $MY_APP_LOG_SERVER.
– Tony Delroy
Feb 21 '14 at 6:19
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Print newline in PHP in single quotes
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Please explain the exec() function and its family
...erations, the entire UNIX execution model can be constructed.
To add some more detail to the above:
The use of fork() and exec() exemplifies the spirit of UNIX in that it provides a very simple way to start new processes.
The fork() call makes a near duplicate of the current process, identical in a...
Hidden features of Scala
...
Okay, I had to add one more. Every Regex object in Scala has an extractor (see answer from oxbox_lakes above) that gives you access to the match groups. So you can do something like:
// Regex to split a date in the format Y/M/D.
val regex = "(\\...
Does C# have an equivalent to JavaScript's encodeURIComponent()?
...It seems to be the most important thing to know on this page, and it needs more visibility.
– Timo
Aug 25 '16 at 15:45
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How do you create a read-only user in PostgreSQL?
... public TO xxx;
This only affects tables that have already been created. More powerfully, you can automatically have default roles assigned to new objects in future:
ALTER DEFAULT PRIVILEGES IN SCHEMA public
GRANT SELECT ON TABLES TO xxx;
Note that by default this will only affect objects (t...