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Java - Method name collision in interface implementation
...Something2 ) are expected ? I cannot even expect client code to be able to cast my instance to the appropriate interface , so am I not loosing something by this restriction ? Also note that in this way , when writing classes that actually implement the respective interfaces , we loose the benefit of...
print call stack in C or C++
...;
int line = -1;
char const* file;
uintptr_t ip2 = reinterpret_cast<uintptr_t>(ip);
Dwfl_Module* module = dwfl_addrmodule(dwfl, ip2);
char const* name = dwfl_module_addrname(module, ip2);
function = name ? demangle(name) : "<unknown>";
if (Dwfl_Line* dwfl_line...
OPTION (RECOMPILE) is Always Faster; Why?
...y estimates for applying both restrictions and a poor execution plan being selected. The fix in this case would be to create a statistics object linking the two columns, which is not an expensive operation.
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Does static constexpr variable inside a function make sense?
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@AndrewLazarus, you can't cast away const from a const object, only from a const X* which points to an X. But that's not the point; the point is that automatic objects cannot have static addresses. As I said, constexpr ceases to be meaningful once the...
Never seen before C++ for loop
...u--; is different from 0, it will be interpreted as true (i.e., implicitly casted to the boolean value true). If, instead, its value is 0, it will be casted to false.
This is very bad code.
Update: I discussed the writing of "for" loops in this blog post. Its recommendations can be summarized in t...
How to convert DateTime? to DateTime
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You can use a simple cast:
DateTime dtValue = (DateTime) dtNullAbleSource;
As Leandro Tupone said, you have to check if the var is null before
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Handle Guzzle exception and get HTTP body
...bled across this in the docs: \GuzzleHttp\Psr7\str($e->getResponse()) Casting the response as a Psr7 String got me a nicely formatted and complete error message.
– Andy Place
Dec 20 '16 at 23:29
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When to use IList and when to use List
...ive the user the richest possible set of operations without them having to cast around. So in that case, if it's a List<T> internally, return a copy as a List<T>.
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Generate random numbers using C++11 random library
...e Breymann (2015) still use a clone of
srand( time( 0 ) );
srand( static_cast<unsigned int>(time(nullptr))); or
srand( static_cast<unsigned int>(time(NULL))); or
just with <random> instead of <time> and <cstdlib> #includings - so be careful to learn just from one bo...
Complete Working Sample of the Gmail Three-Fragment Animation Scenario?
...ses a ThreePaneLayout to hold a pair of ListFragment widgets and a Button. Selecting something in the left fragment adds (or updates the contents of) the middle fragment. Selecting something in the middle fragment sets the caption of the Button, plus executes hideLeft() on the ThreePaneLayout. Press...