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How to properly check if std::function is empty in C++11?
I was wondering how to properly check if an std::function is empty. Consider this example:
3 Answers
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Alternatives to java.lang.reflect.Proxy for creating proxies of abstract classes (rather than interf
...lass(Dog.class);
factory.setFilter(
new MethodFilter() {
@Override
public boolean isHandled(Method method) {
return Modifier.isAbstract(method.getModifiers());
}
}
);
MethodHandler handler = new MethodHandler() {
@Override
public Object invoke(Obj...
Naming convention for utility classes in Java
When writing utility classes in Java, what are some good guidelines to follow?
5 Answers
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Do I set properties to nil in dealloc when using ARC?
...hat it shouldn't touch in dealloc (e.g. if your class, or a subclass, overrides the setter). Similarly it may trigger KVO notifications. Releasing the ivar instead avoids these undesired behaviors.
In ARC, the system automatically releases any ivars for you, so if that's all you're doing you don't ...
RSpec: describe, context, feature, scenario?
...edited Oct 16 '18 at 13:44
M.javid
5,02333 gold badges3232 silver badges5151 bronze badges
answered Jul 26 '12 at 9:04
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Control the size of points in an R scatterplot?
... to be too small, but pch=19 to be too fat. Is there something in the middle or some way to scale the dots down somehow?
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How do I close a connection early?
...es a bit more than sending a close header.
OP then confirms: yup, this did the trick: pointing to user-note #71172 (Nov 2006) copied here:
Closing the users browser connection whilst keeping your php script running has been an issue since [PHP] 4.1, when the behaviour of register_shutdown_fun...
What is the equivalent of “none” in django templates?
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Any idea how to use this with other filters such as date? For example, is it possible to display "N/A" if a date is none but otherwise format it? Like: {{ post.pub_date|default_if_none:"N/A"|date:"Y-m-d" }}?
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datetime dtypes in pandas read_csv
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Aside from the fact that this doesn't have the desired effect, it also doesn't work: AttributeError: type object 'datetime.datetime' has no attribute 'datetime'
– Gabriel
Dec 1 '16 at 9:29...
PHP memory profiling
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If it helps anyone... when using php-fpm, pid might not change between different request. With default profiler_output_name, this leads xdebug to overwrite previous data. Change this value using something else from xdebug.org/docs/all_settings#trace_output_name
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