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Pinging servers in Python
...on 2 and Python 3
EDITS:
By @radato os.system was replaced by subprocess.call. This avoids shell injection vulnerability in cases where your hostname string might not be validated.
import platform # For getting the operating system name
import subprocess # For executing a shell command
def pi...
parseInt vs unary plus, when to use which?
...uld be explained here. It's bitwise equivalent of Math.floor(), which basically chops off the decimal part.
– Joseph
Jun 14 '13 at 11:01
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Comparing arrays in JUnit assertions, concise built-in way?
...dResult, result );
If this method is not available, you may have accidentally imported the Assert class from junit.framework.
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Difference between setUp() and setUpBeforeClass()
....
So let's assume you had three tests in your class, the order of method calls would be:
setUpBeforeClass()
(Test class first instance constructed and the following methods called on it)
setUp()
test1()
tearDown()
(Test class second instance constructed and the following methods ...
How do I convert a Java 8 IntStream to a List?
...
@skiwi I mean, that all the other answers are unneeded after this one as they would be not so natural.
– Dmitry Ginzburg
May 15 '14 at 9:56
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Any way to modify Jasmine spies based on arguments?
I have a function I'd like to test which calls an external API method twice, using different parameters. I'd like to mock this external API out with a Jasmine spy, and return different things based on the parameters. Is there any way to do this in Jasmine? The best I can come up with is a hack using...
Java 256-bit AES Password-Based Encryption
I need to implement 256 bit AES encryption, but all the examples I have found online use a "KeyGenerator" to generate a 256 bit key, but I would like to use my own passkey. How can I create my own key? I have tried padding it out to 256 bits, but then I get an error saying that the key is too long. ...
How can I put a ListView into a ScrollView without it collapsing?
...ll work in a future release. Using a LinearLayout would not be much work really.
– Romain Guy
Aug 16 '10 at 19:52
7
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Create numpy matrix filled with NaNs
...r 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 alternatives a[:] ...
What is a clearfix?
...of laying out elements.)
A clearfix is a way for an element to automatically clear its child elements, so that you don't need to add additional markup. It's generally used in float layouts where elements are floated to be stacked horizontally.
The clearfix is a way to combat the zero-height cont...