大约有 43,000 项符合查询结果（耗时：0.0401秒） [XML]
Count number of days between two dates
... dates.
The one that comes closest is by thatdankent. A full answer would convert to_i and then divide:
(Time.now.to_i - 23.hours.ago.to_i) / 86400
>> 0
(Time.now.to_i - 25.hours.ago.to_i) / 86400
>> 1
(Time.now.to_i - 1.day.ago.to_i) / 86400
>> 1
In the question's specific e...
Use of “this” keyword in formal parameters for static methods in C#
...ing" support popular within dynamic languages
today with the performance and compile-time validation of
strongly-typed languages.
Extension Methods enable a variety of useful scenarios, and help make
possible the really powerful LINQ query framework... .
it means that you can call
MyC...
In Java, how do I call a base class's method from the overriding method in a derived class?
...
This doesn't show any java reflection in the code and is the same code as the others. Is there more to the answer?
– Nelda.techspiress
Aug 9 '17 at 17:09
...
Extract every nth element of a vector
...eyond the seq solution already mentioned) is to use a short logical vector and use vector recycling:
foo[ c( rep(FALSE, 5), TRUE ) ]
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How to correctly sort a string with a number inside? [duplicate]
I have a list of strings containing numbers and I cannot find a good way to sort them.
For example I get something like this:
...
Remove background drawable programmatically in Android
... In case that doesn't work: check if you've used the background property and not android:src!
– Chris Conway
Oct 16 '12 at 23:00
3
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Java split string to array [duplicate]
... as if by invoking the two-argument split method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.
If you want those trailing empty strings included, you need to use String.split(String regex, int limit) with a negativ...
What is this smiley-with-beard expression: “”?
...r 1 '13 at 0:56
R. Martinho FernandesR. Martinho Fernandes
203k6565 gold badges404404 silver badges487487 bronze badges
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c++获取windows程序的版本号 - C/C++ - 清泛网 - 专注C/C++及内核技术
... // Get the version information size for allocate the buffer
DWORD dwHandle;
DWORD dwDataSize = ::GetFileVersionInfoSize((LPTSTR)lpszModuleName, &dwHandle);
if ( dwDataSize == 0 )
return FALSE;
// Allocate buffer and retrieve version information
LPBYTE lpVersion...
Finding differences between elements of a list
...cess is a method call in python
numpy.diff is slow because it has to first convert the list to a ndarray. Obviously if you start with an ndarray it will be much faster:
In [22]: arr = np.array(L)
In [23]: %timeit np.diff(arr)
100 loops, best of 3: 3.02 ms per loop
...