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Track the time a command takes in UNIX/LINUX?
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Note that using /usr/bin/time prevents you from using bash aliases. The bash builtin time is needed for that, else you'll get the error cannot run my_alias: No such file or directory.
– Jamie S
Sep 20 '18 at 17:28
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datetime.parse and making it work with a specific format
I have a datetime coming back from an XML file in the format:
2 Answers
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python numpy machine epsilon
...zonaws.com/… Basically, if you subtract the binary representation of 4/3 from 7/3, you get the definition of machine epsilon. So I suppose this should hold for any platform.
– Steve Tjoa
Jul 8 '15 at 18:24
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Function to calculate distance between two coordinates
...perly. According to Google Maps, the distance between these coordinates (from 59.3293371,13.4877472 to 59.3225525,13.4619422 ) are 2.2 kilometres while the function returns 1.6 kilometres. How can I make this function return the correct distance?
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Using PropertyInfo to find out the property type
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The IsAssignableFrom method: msdn.microsoft.com/en-us/library/… will work in more cases (instead of the equal operator, e.g. generics)
– martin
May 31 '16 at 19:28
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vertical & horizontal lines in matplotlib
... the axis.
Instead, use plt.plot((x1, x2), (y1, y2), 'k-') to draw a line from the point (x1, y1) to the point (x2, y2) in color k. See pyplot.plot.
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Can I use non existing CSS classes?
...les. Indeed, that's part of the usefulness of CSS is that it's de-coupled from the markup and can style or not style elements/classes/etc. as needed.
Don't think of them as "CSS classes." Think of them as "classes" which CSS happens to also use if it needs to.
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How to store arbitrary data for some HTML tags
... In order to retrieve the data, 1337, via jquery, be sure to remove 'data' from the variable name. For eg, use: $(this).data('internalid'); Instead of: $(this).data('data-internalid');
– Gideon Rosenthal
Sep 11 '14 at 22:07
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Comment out text in R Markdown (Rmd file)
...```{r}
# x = pi
# ```
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Note however that this does not prevent knitr from evaluating inline r code.
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How to get the first non-null value in Java?
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Following on from LES2's answer, you can eliminate some repetition in the efficient version, by calling the overloaded function:
public static <T> T coalesce(T a, T b) {
return a != null ? a : b;
}
public static <T> T coa...