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How do I programmatically change file permissions?
In Java, I'm dynamically creating a set of files and I'd like to change the file permissions on these files on a linux/unix file system. I'd like to be able to execute the Java equivalent of chmod . Is that possible Java 5? If so, how?
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Create numpy matrix filled with NaNs
...oops for vector operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I have timed the alte...
When to prefer JSON over XML?
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JSON doesn't offer any advantage over XML in handling marked-up text. But I see your point; that's maybe overstated.
– Robert Rossney
Jan 10 '10 at 4:52
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What is the difference between JDK and JRE?
What is the difference between JDK and JRE?
20 Answers
20
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Do I need elements in persistence.xml?
...="OrderManagement">
<description>This unit manages orders and customers.
It does not rely on any vendor-specific features and can
therefore be deployed to any persistence provider.
</description>
<jta-data-source>jdbc/MyOrderDB<...
Is there a portable way to get the current username in Python?
...e current user's username in Python (i.e., one that works under both Linux and Windows, at least). It would work like os.getuid :
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How to stop text from taking up more than 1 line?
...ap or any other attribute that stops text from wrapping? I have a height, and overflow:hidden , and the text still breaks.
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Static extension methods [duplicate]
...ring);
So as you can see, there's no way to do that for static methods.
And another thing just dawned on me: what would really be the point of being able to add static methods on existing classes? You can just have your own helper class that does the same thing, so what's really the benefit in be...
How do I format a long integer as a string without separator in Java?
...sking on here will probably be more straight forward than trying to understand the documentation for MessageFormat :
6 Ans...
All combinations of a list of lists
...rapper function that takes a as input, iterates over itertools.product(*a) and yields both the tuple produced by itertools and a reverse version (e.g. create a list, reverse() it and convert back to tuple). Best ask a new question.
– Joachim Wagner
Feb 26 at 11...