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What is the difference between float and double?
...g point types: float, double, and long double. The type double provides at least as much precision as float, and the type long double provides at least as much precision as double. The set of values of the type float is a subset of the set of values of the type double; the set of values of the type ...
Should I instantiate instance variables on declaration or in the constructor?
...within your class. Instead, using Dependency Injection is preferable". At least you said preferable. This Uncle Bob'ism can cause lots of problems (like factory explosion) if followed zealously. There is nothing wrong with the new operator and not all dependencies need to be injected either, espe...
Does it make sense to use “as” instead of a cast even if there is no null check? [closed]
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@RMorrisey: I have at least one example in mind: Assume you have a cache object that another thread tries to invalidate it by setting it to null. In lock-free scenarios, these kind of stuff can arise.
– Mehrdad Afshari
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What's the best way to trim std::string?
...that's only useful in the case of an all-whitespace string, and gcc 4.8 at least isn't smart enough to infer the type of the reverse iterator (std::string::const_reverse_iterator) with auto. I don't know how expensive constructing a reverse iterator is, so YMMV here. With this alteration, the code l...
String concatenation vs. string substitution in Python
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This code has at least 2 bad programming practices: expectation of global variables (domain and questions are not declared inside function) and passing more variables than needed to a format() function. Downvoting because this answer teaches ...
Limitations of Intel Assembly Syntax Compared to AT&T [closed]
...use you always specify it and it really reduces the amount of mistakes (at least for me). About the rest (for example the $ and % symbols).. yeah.. they're not pleasant, and that's the point, but they do have an advantage: it's explicit and once again reduces mistakes. I'd say that one is comfortabl...
Android 4.3 Bluetooth Low Energy unstable
...] scanRecord) in the same thread on Samsung Galaxy S3 with Android 4.3 (at least for build JSS15J.I9300XXUGMK6)
Most devices filter advertising
Better not use android.bluetooth.BluetoothAdapter#startLeScan(UUID[] serviceUuids, LeScanCallback callback) with the parameter to filter for certain servic...
Deserialize JSON to ArrayList using Jackson
... Visually inspect your array to make sure you got back a list at least. And if need be add the mixin back, which should work along with the TypeReference to get everything neatly deserialized.
– Perception
Mar 22 '12 at 20:27
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How to loop over files in directory and change path and add suffix to filename
... @CaseyKlimkowsky: Yes; when the code and the comments disagree, at least one of them is wrong. In this case, I think it is only the one — the code; often, it is actually both that are wrong. Thanks for pointing that out; I've fixed it.
– Jonathan Leffler
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How does generic lambda work in C++14?
...template call operator of C++11's lambdas (of course, when auto appears at least once in the parameter list).
So your example:
auto glambda = [] (auto a) { return a; };
Will make glambda an instance of this type:
class /* unnamed */
{
public:
template<typename T>
T operator () (T...