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What's the difference between Perl's backticks, system, and exec?
Can someone please help me? In Perl, what is the difference between:
5 Answers
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Add single element to array in numpy
...h the appended element.
I think it's more normal to use the proper method for adding an element:
a = numpy.append(a, a[0])
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Is there a command like “watch” or “inotifywait” on the Mac?
...ter (0) as line separator.
-1, --one-event Exit fsw after the first set of events is received.
-e, --exclude=REGEX Exclude paths matching REGEX.
-E, --extended Use exended regular expressions.
-f, --format-time Print the event time using the specified format.
-h, --help ...
Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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Unable to modify ArrayAdapter in ListView: UnsupportedOperationException
... editor after snippets, if snippets enabled
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Accessing @attribute from SimpleXML
I am having a problem accessing the @attribute section of my SimpleXML object. When I var_dump the entire object, I get the correct output, and when I var_dump the rest of the object (the nested tags), I get the correct output, but when I follow the docs and var_dump $xml->OFFICE->{'...
Control the size of points in an R scatterplot?
...her option. It only works some of the time; the rule is that when 'cex' is set via 'par', it affects the size of (most) text on the plot, when set inside 'plot', 'cex' affects only symbol size. So if you mis-apply that rule then not only is your symbol size not changed, but you now have multiple par...
How many double numbers are there between 0.0 and 1.0?
This is something that's been on my mind for years, but I never took the time to ask before.
6 Answers
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Find and restore a deleted file in a Git repository
Say I'm in a Git repository. I delete a file and commit that change. I continue working and make some more commits. Then, I find I need to restore that file.
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How to smooth a curve in the right way?
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I prefer a Savitzky-Golay filter. It uses least squares to regress a small window of your data onto a polynomial, then uses the polynomial to estimate the point in the center of the window. Finally the window is shifted forward by...