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Pinging servers in Python
...import subprocess
ping_response = subprocess.Popen(["/bin/ping", "-c1", "-w100", "192.168.0.1"], stdout=subprocess.PIPE).stdout.read()
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编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...活。这行语句会变成对函数_CxxThrowException (函数来自MSVCR100.dll或其他类似版本的dll)的调用。 这个函数有编译器内部构建。你喜欢的话，你可以自己调用它。这个函数的第一个参数是指向抛出的异常对象的指针。 所以，上面的代...
Get current AUTO_INCREMENT value for any table
...N_TYPE,
c.MAX_VALUE,
t.AUTO_INCREMENT,
IF (c.MAX_VALUE > 0, ROUND(100 * t.AUTO_INCREMENT / c.MAX_VALUE, 2), -1) AS "Usage (%)"
FROM
(SELECT
TABLE_SCHEMA,
TABLE_NAME,
COLUMN_TYPE,
CASE
WHEN COLUMN_TYPE LIKE 'tinyint(1)' THEN 127
WHEN COLUMN_TYPE LIKE...
Override and reset CSS style: auto or none don't work
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width: auto when all I wanted to override was width: 100% -- Thank you
– Meredith
Sep 24 '18 at 4:14
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How to convert an NSTimeInterval (seconds) into minutes
...n the style of Brian Ramsey (and others)... and surprisingly, even polling 100 times a second (which is tremendous overkill) on a relatively slow device (4S) there was less than a 1% difference in processor utilization.
– mmc
Jan 8 '14 at 13:50
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Measuring elapsed time with the Time module
...g-running.
Resolution starts breaking down on perf_counter() after around 100 days. So for example after a year of uptime, the shortest interval (greater than 0) it can measure will be bigger than when it started.
Update for Python 3.8
time.clock is now gone.
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What is the difference between std::array and std::vector? When do you use one over other? [duplicat
...tienne de Martel
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Add vertical whitespace using Twitter Bootstrap?
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The OP specifically asked: "a bit (100px) of blank white space above and below a certain button"
– icc97
Jan 8 '16 at 18:50
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Is “else if” faster than “switch() case”? [duplicate]
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Yes, but the first 4-5 cases has to catch very close to 100% of the occurances to make up for the slower ones.
– Guffa
Apr 20 '09 at 12:36
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Tricky Google interview question
... 1 2 4 8 16 32
1| 5 10 20 40 80 160
2| 25 50 100 200 400 800
3| 125 250 500 1000 2000 ...
4| 625 1250 2500 5000 ...
j on the vertical
what you need to do is 'walk' this matrix, starting at (0,0). You also need to keep track of what your possible next moves are. ...