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What is a race condition?
... between "if (x == 5)" and "y = x * 2" above,
// y will not be equal to 10.
}
The point being, y could be 10, or it could be anything, depending on whether another thread changed x in between the check and act. You have no real way of knowing.
In order to prevent race conditions from occurring...
Redis is single-threaded, then how does it do concurrent I/O?
...
Didier SpeziaDidier Spezia
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How to insert a text at the beginning of a file?
...nswer here? Line addressing!.
Want to add <added text> on the first 10 lines?
$ sed -i '1,10s/^/<added text> /' file
Or you can use Command Grouping:
$ { echo -n '<added text> '; cat file; } >file.new
$ mv file{.new,}
...
push_back vs emplace_back
...aid :
The function void emplace_back(Type&& _Val) provided by MSCV10 is non conforming and redundant, because as you noted it is strictly equivalent to push_back(Type&& _Val).
But the real C++0x form of emplace_back is really useful: void emplace_back(Args&&...);
Instead o...
overlay opaque div over youtube iframe
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210
Information from the Official Adobe site about this issue
The issue is when you embed a youtub...
How to prevent text in a table cell from wrapping
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edited Jan 31 '14 at 10:18
Jeroen
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ans...
What is cURL in PHP?
...l version that's
7.9.8 or higher. PHP 5.0.0 requires a libcurl version 7.10.5 or greater.
You can make HTTP requests without cURL, too, though it requires allow_url_fopen to be enabled in your php.ini file.
// Make a HTTP GET request and print it (requires allow_url_fopen to be enabled)
print ...
CSS hexadecimal RGBA?
...Example 3In other words, #0000ffcc represents the same color as rgba(0, 0, 100%, 80%) (a slightly-transparent blue).
4 digits
This is a shorter variant of the 8-digit notation, "expanded" in the same way as the 3-digit notation is. The first digit, interpreted as a hexadecimal number, s...
What is the difference between location list and quickfix list in vim
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110
The location list is local to the current window so you can have as many location lists as wind...
How to concatenate string variables in Bash
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answered Nov 15 '10 at 5:41
codaddictcodaddict
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