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How to correctly use the extern keyword in C
..., this only tells the compiler that linkage is extern. As this is the default (you use the keyword "static" to indicate that a function is not bound using extern linkage) you don't need to use it explicitly.
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Test if object implements interface
... operator is null safe (the code you posted isn't).
instanceof is the built-in, compile-time safe alternative to Class#isInstance(Object)
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fol...
Is there a function that returns the current class/method name? [duplicate]
...Unknown"; should handle the warning while giving the most appropriate result to the situation if in fact it ever actually does occur.
– bielawski
Feb 20 at 15:14
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How to define an enumerated type (enum) in C?
...ithout any complaints (compiled with gcc -ansi -pedantic -Wall):
#include <stdio.h>
enum { RANDOM, IMMEDIATE, SEARCH } strategy = IMMEDIATE;
int main(int argc, char** argv){
printf("strategy: %d\n", strategy);
return 0;
}
If instead of the above, the second line were changed to:
.....
Reflection generic get field value
...Field. for instance, to fetch all Fields of a given class;
for (Class<?> c = someClass; c != null; c = c.getSuperclass())
{
Field[] fields = c.getDeclaredFields();
for (Field classField : fields)
{
result.add(classField);
}
}
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Is it possible to get CMake to build both a static and shared version of the same library?
...ed reduce compilation time by half, but it requires static libraries be built as Position Independent Code (i.e. with -fPIC), which adds a small amount of runtime overhead when those static libraries are used. So for maximum performance, this answer is still the best.
– John Z...
How to get a file or blob from an object URL?
... reader.onloadend = function() {
var base64data = reader.result;
self.props.onMainImageDrop(base64data)
}
})
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Java JTable setting Column Width
...efully. Here are some choice bits:
When the method is called as a result of the resizing of an enclosing window, the
resizingColumn is null. This means that resizing has taken place "outside" the JTable
and the change - or "delta" - should be distributed to all of the columns regardless of
...
Storing Python dictionaries
...fp)
Supply extra arguments, like sort_keys or indent, to get a pretty result. The argument sort_keys will sort the keys alphabetically and indent will indent your data structure with indent=N spaces.
json.dump(data, fp, sort_keys=True, indent=4)
JSON load:
with open('data.json', 'r') as fp:
da...
Why can Java Collections not directly store Primitives types?
...nguage. Autoboxing is nice syntactic sugar, but is still a performance penalty. If anything, I'd like the compiler to warn me when it autoboxes. (For all I know, it may now, I wrote this answer in 2010).
A good explanation on SO about boxing: Why do some languages need Boxing and Unboxing?
And cri...