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Iterate keys in a C++ map
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If you really need to hide the value that the "real" iterator returns (for example because you want to use your key-iterator with standard algorithms, so that they operate on the keys instead of the pairs), then take a look at Boost's transform_iterator.
[Tip: when looking at Boost documentatio...
What is the use of static variable in C#? When to use it? Why can't I declare the static variable in
...etter but if you show me example that i show above than it cound be better for me and others....anyway good effort....
– Kartik Patel
May 31 '12 at 13:57
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Gradle does not find tools.jar
...ools.jar is indeed in \lib, adding only \bin to path as in solution worked for me but don't ask why.
– PHPirate
May 19 '17 at 16:09
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MFC 获取当前时间的几种方法总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ime curTime = CTime::GetCurrentTime();CString strCurTime;strCurTime.Format(_T("d d d d:d:d"), curTime...1.CTime类获取当前时间
CTime curTime = CTime::GetCurrentTime();
CString strCurTime;
strCurTime.Format(_T("d/d/d d:d:d"), curTime.GetYear(), curTime.GetMonth(), curTime.GetDay(), curTi...
Code for Greatest Common Divisor in Python [closed]
...ted. Moreover, inspect.getsource no longer returns explanatory source code for either method.
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How to join two sets in one line without using “|”
...ing the join operator | , how can I find the union of the two sets? This, for example, finds the intersection:
8 Answers
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Ways to implement data versioning in MongoDB
...question regarding Cassandra . If you have any thoughts which db is better for that please share)
8 Answers
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Find unique rows in numpy.array
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As of NumPy 1.13, one can simply choose the axis for selection of unique values in any N-dim array. To get unique rows, one can do:
unique_rows = np.unique(original_array, axis=0)
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What is the fastest way to compute sin and cos together?
I would like to compute both the sine and co-sine of a value together (for example to create a rotation matrix). Of course I could compute them separately one after another like a = cos(x); b = sin(x); , but I wonder if there is a faster way when needing both values.
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Is there an alternative sleep function in C to milliseconds?
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The usleep() function suspends execution of the calling thread for
(at least) usec microseconds. The sleep may be lengthened slightly by
any system activity or by the time spent processing the call or by the
granularity of system timers.
usleep() takes micro...