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How is an overloaded method chosen when a parameter is the literal null value?
...on 15.12.2.5 of the JLS. In particular:
The informal intuition is that one method is more specific than another if any invocation handled by the first method could be passed on to the other one without a compile-time type error.
In your second case, both methods are still applicable, but neith...
conditional unique constraint
...re i need to enforce a unique constraint on a set of columns, but only for one value of a column.
6 Answers
...
How can one print a size_t variable portably using the printf family?
... return 0;
}
VS2015 generated binary outputs:
1
1
2
while the one generated by VS2013 says:
zu
zx
zd
Note: ssize_t is a POSIX extension and SSIZE_T is similar thing in Windows Data Types, hence I added <BaseTsd.h> reference.
Additionally, except for the follow C99/C11 h...
CSS3 transition events
...sent at the end of a transition. The event is an instance of WebKitTransitionEvent, and its type is webkitTransitionEnd.
box.addEventListener( 'webkitTransitionEnd',
function( event ) { alert( "Finished transition!" ); }, false );
Mozilla
There is a single event that is fired when trans...
Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...stionable whether floating point is desirable in that arena at all.
Since one of its initial use cases was to code up UNIX, the floating point would have been next to useless. BCPL, on which C was based, also had no use for powers (it didn't have floating point at all, from memory).
As an aside...
How to convert an iterator to a stream?
...
One way is to create a Spliterator from the Iterator and use that as a basis for your stream:
Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator();
Stream<String> targetStream = StreamSupport....
Python time measure function
...ou change it to a function, it will be:
images = get_images()
bitImage = None
@timeit
def foobar():
nonlocal bigImage
bigImage = ImagePacker.pack(images, width=4096)
drawer.draw(bigImage)
Looks not so great...What if you are in Python 2, which has no nonlocal keyword.
Instead, using the ...
Why are there two ways to unstage a file in Git?
...
So typically, one would use git rm --cached <filePath> to remove some file(s) from the repo after realizing it should have never been in the repo: so most likely running this command & then adding the relevant files to gitignore....
Removing duplicate rows in vi?
I have a text file that contains a long list of entries (one on each line). Some of these are duplicates, and I would like to know if it is possible (and if so, how) to remove any duplicates. I am interested in doing this from within vi/vim, if possible.
...
“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
...value of an uninitialized variable is problematic in the case of including one file into another which uses the same variable name. It is also a major security risk with register_globals turned on. E_NOTICE level error is issued in case of working with uninitialized variables, however not in the cas...