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multiprocessing: How do I share a dict among multiple processes?
...rogram that creates several processes that work on a join-able queue, Q , and may eventually manipulate a global dictionary D to store results. (so each child process may use D to store its result and also see what results the other child processes are producing)
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Performance of FOR vs FOREACH in PHP
First of all, I understand in 90% of applications the performance difference is completely irrelevant, but I just need to know which is the faster construct. That and...
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Turning multi-line string into single comma-separated
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You can use awk and sed:
awk -vORS=, '{ print $2 }' file.txt | sed 's/,$/\n/'
Or if you want to use a pipe:
echo "data" | awk -vORS=, '{ print $2 }' | sed 's/,$/\n/'
To break it down:
awk is great at handling data broken down into fi...
Convert dmesg timestamp to custom date format
I am trying to understand the dmesg timestamp and find it hard to convert that to change it to java date/custom date format.
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关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
..._enable($buffer, EV_READ | EV_PERSIST);
// we need to save both buffer and connection outside
self::$connections[$id] = $connection;
self::$buffers[$id] = $buffer;
}
function ev_error($buffer, $error, $id)
{
event_buffer_disable(self::$buffers[$id], EV_READ | EV_WRITE);
event_buf...
How to get the first line of a file in a bash script?
... a bash variable the first line of a file. I guess it is with the grep command, but it is any way to restrict the number of lines?
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Histogram using gnuplot?
...already has properly binned data. Is there a way to take a list of numbers and have gnuplot provide a histogram based on ranges and bin sizes the user provides?
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stdlib and colored output in C
...which requires colored output. How can I make my output colored like emacs and bash do?
7 Answers
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How can I quickly sum all numbers in a file?
I have a file which contains several thousand numbers, each on it's own line:
33 Answers
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How is set() implemented?
...ython source code for set which, according to Achim Domma, is mostly a cut-and-paste from the dict implementation.
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