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Why use a ReentrantLock if one can use synchronized(this)?
I'm trying to understand what makes the lock in concurrency so important if one can use synchronized (this) . In the dummy code below, I can do either:
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How can I download HTML source in C#
...our suggestion after I read Joe Albahari's example. LINQPad > Help > What's New, and search for Cache.
– Colin
Jul 28 '13 at 1:42
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std::string length() and size() member functions
...rators over CharT elements. CharT is a template parameter that determines what's in the string. For std::string, CharT is char. For std::wstring, CharT is wchar_t, which is typically 2 or 4 bytes. Even there, both length() and size() will return the number of characters in the string, NOT the numb...
C# short/long/int literal format?
In C / C# / etc. you can tell the compiler that a literal number is not what it appears to be (ie., float instead of double , unsigned long instead of int :
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Difference between Python datetime vs time modules
... figure out the differences between the datetime and time modules, and what each should be used for.
4 Answers
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Mercurial for Beginners: The Definitive Practical Guide
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How do you see what's uncommitted, or the status of your current codebase?
To see a list of files that have been changed:
$ hg status
This will print each file that has been changed along with its status, which can include:
M - Modifi...
Return 0 if field is null in MySQL
... @MarkByers can you show why Kevin's example in the comment is wrong and what it should actually be?
– Michael
Aug 10 '16 at 13:44
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How does IPython's magic %paste work?
...stand command prompt's right-click behavior is that it actually just takes whatever is in the clipboard and outputs it character by character as though you are typing it. So iPython has no way to know you are in fact pasting.
– Kal
Sep 27 '19 at 3:07
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Is it a good idea to index datetime field in mysql?
...mestamp is better than DateTime. Note, he used MySql. But I feel no matter what DB engine you use comparing integers are slightly faster than comparing dates so int index is better than DateTime index. Take T1 - time of comparing 2 dates, T2 - time of comparing 2 integers. Search on indexed field ta...
How to download/checkout a project from Google Code in Windows?
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Almost exactly what I was looking for (and exactly for the asker), except I was looking for a website where I can enter the SVN URL and it will let me download a ZIP of the checked out source. But I guess, a simple app like this can also wo...