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How to get all subsets of a set? (powerset)
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This is the fastest answer I could find, comparing some other solutions on this page to this one using Python's timeit module. However, in certain cases, if you need to modify the resulting output (e.g. joining the letters to form strings) ...
What Does 'Then' Really Mean in CasperJS
...unction(step) {
return step.toString();
}));
That gives:
$ casperjs test-steps.js
[
"function step1() { this.echo('this is step one'); }",
"function step2() { this.echo('this is step two'); }",
"function _step() { this.open(location, settings); }",
"function step3() { this.ech...
Why does pylint object to single character variable names?
...me; it's someone else's schema.) There must be many such exceptions which test the rule.
– Mark Wood
Aug 27 at 14:16
add a comment
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C++ templates that accept only certain types
...pe(std::declval<const T&>().end())>
static std::true_type test(int);
template<typename...>
static std::false_type test(...);
};
template<typename T>
struct has_begin_end : decltype(has_begin_end_impl::test<T>(0)) {};
template<typename T>
class obser...
How can I convert an RGB image into grayscale in Python?
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Three of the suggested methods were tested for speed with 1000 RGBA PNG images (224 x 256 pixels) running with Python 3.5 on Ubuntu 16.04 LTS (Xeon E5 2670 with SSD).
Average run times
pil : 1.037 seconds
scipy: 1.040 seconds
sk : 2.120 seconds
PIL and ...
Join/Where with LINQ and Lambda
...IN condition; you don't need to use WHERE clause!": the WHERE clause isn't testing equality between ID fields, it's testing equality between the post ID column and the id parameter declared outside the query.
– Daniel Schaffer
May 27 '13 at 15:45
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RichTextBox (WPF) does not have string property “Text”
...chTextBox, but Text is not among list of its properties when I want to get test.Text...
10 Answers
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Check to see if python script is running
....error:
print 'lock exists'
sys.exit()
get_lock('running_test')
while True:
time.sleep(3)
It is atomic and avoids the problem of having lock files lying around if your process gets sent a SIGKILL
You can read in the documentation for socket.close that sockets are automatically...
Installing SciPy with pip
...ll http://svn.scipy.org/svn/scipy/!svn/bc/5839/trunk/ although I have not tested that...
– Olivier Verdier
Feb 6 '10 at 21:02
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How to get body of a POST in php?
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according to my test, this php://input is empty for application/x-www-form-urlencoded content-type as well (besides multipart/form-data)
– YakovL
Feb 16 '18 at 23:59
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