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Is there a simple, elegant way to define singletons? [duplicate]

... I don't really see the need, as a module with functions (and not a class) would serve well as a singleton. All its variables would be bound to the module, which could not be instantiated repeatedly anyway. If you do wish to use a cla...
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How do I get the real .height() of a overflow: hidden or overflow: scroll div?

...qual to the minimum clientHeight the element would require in order to fit all the content in the viewpoint without using a vertical scrollbar. It includes the element padding but not its margin. share | ...
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Is there a command for formatting HTML in the Atom editor?

...eautify - Package for Atom, you can format code for HTML, CSS, JavaScript, PHP, Python, Ruby, Java, C, C++, C#, Objective-C, CoffeeScript, TypeScript, Coldfusion, SQL, and more) in Atom within a matter of seconds. To Install the atom-beautify package : Open Atom Editor. Press Ctrl+Shift+P (Cmd+Shif...
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How exactly does __attribute__((constructor)) work?

... It runs when a shared library is loaded, typically during program startup. That's how all GCC attributes are; presumably to distinguish them from function calls. GCC-specific syntax. Yes, this works in C and C++. No, the function does not need to be static. The destructo...
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What is the difference between .*? and .* regular expressions?

...nsider the input 101000000000100. Using 1.*1, * is greedy - it will match all the way to the end, and then backtrack until it can match 1, leaving you with 1010000000001. .*? is non-greedy. * will match nothing, but then will try to match extra characters until it matches 1, eventually matching 101...
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How to set versionName in APK filename using gradle?

...ind, but doesn't work well with flavors with different version codes. They all end up with same version code. – weston May 6 '17 at 15:08 2 ...
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Hashing a dictionary?

...e hash(): hash(frozenset(my_dict.items())) This is much less computationally intensive than generating the JSON string or representation of the dictionary. UPDATE: Please see the comments below, why this approach might not produce a stable result. ...
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What is the advantage of GCC's __builtin_expect in if else statements?

... I guess it should be something like: cmp $x, 0 jne _foo _bar: call bar ... jmp after_if _foo: call foo ... after_if: You can see that the instructions are arranged in such an order that the bar case precedes the foo case (as opposed to the C code). This can utilise the CPU ...
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How do I perform the SQL Join equivalent in MongoDB?

...rect. The new $lookup operator added to the aggregation pipeline is essentially identical to a left outer join: https://docs.mongodb.org/master/reference/operator/aggregation/lookup/#pipe._S_lookup From the docs: { $lookup: { from: <collection to join>, localField: &lt...
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Fastest way to list all primes below N

...4.0 | | sundaram3 | 416.0 | +---------------------+-------+ Of all the methods tested, allowing numpy, for n=1000000, primesfrom2to was the fastest tested. +---------------------+-------+ | Method | ms | +---------------------+-------+ | primesfrom2to | 15.9 | | p...