大约有 48,000 项符合查询结果(耗时:0.0703秒) [XML]

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Find all storage devices attached to a Linux machine [closed]

... /proc/partitions will list all the block devices and partitions that the system recognizes. You can then try using file -s <device> to determine what kind of filesystem is present on the partition, if any. ...
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Why do pthreads’ condition variable functions require a mutex?

...adcast to, one or more of the threads on the waiting list will be woken up and the mutex will be magically locked again for that thread. You typically see the following operation with condition variables, illustrating how they work. The following example is a worker thread which is given work via a...
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Autoreload of modules in IPython [duplicate]

...lly requested to. I'm doing a lot of exploratory programming using IPython and SciPy and it's quite a pain to have to manually reload each module whenever I change it. ...
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Difference between CLOCK_REALTIME and CLOCK_MONOTONIC?

Could you explain the difference between CLOCK_REALTIME and CLOCK_MONOTONIC clocks returned by clock_gettime() on Linux? ...
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Calculate the center point of multiple latitude/longitude coordinate pairs

Given a set of latitude and longitude points, how can I calculate the latitude and longitude of the center point of that set (aka a point that would center a view on all points)? ...
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Setting individual axis limits with facet_wrap and scales = “free” in ggplot2

...meters. I train the model with 85% of the data, test on the remaining 15%, and repeat this 5 times, collecting actual/predicted values each time. After calculating the residuals, my data.frame looks like this: ...
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Get bitcoin historical data [closed]

...bitcoincharts.com/v1/csv/ it is updated twice a day for active exchanges, and there is a few dead exchanges, too. EDIT: Since there are no column headers in the CSVs, here's what they are : column 1) the trade's timestamp, column 2) the price, column 3) the volume of the trade ...
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Arrays, heap and stack and value types

...m what I've read on CLR via c#, the answer is yes. But what I can't understand, is what happens to the actual int's inside the array. As they are value types, I'd guess they'd have to be boxed, as I can, for example, pass myIntegers to other parts of the program and it'd clutter up the stack if they...
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How do I represent a time only value in .NET?

... As others have said, you can use a DateTime and ignore the date, or use a TimeSpan. Personally I'm not keen on either of these solutions, as neither type really reflects the concept you're trying to represent - I regard the date/time types in .NET as somewhat on the sp...
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How do I install an R package from source?

... If you have the file locally, then use install.packages() and set the repos=NULL: install.packages(path_to_file, repos = NULL, type="source") Where path_to_file would represent the full path and file name: On Windows it will look something like this: "C:\\RJSONIO_0.2-3.tar.gz...