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How can I pass command-line arguments to a Perl program?
...rts only single-character switches and GetOpt::Long is much more flexible. From GetOpt::Long:
use Getopt::Long;
my $data = "file.dat";
my $length = 24;
my $verbose;
$result = GetOptions ("length=i" => \$length, # numeric
"file=s" => \$data, # string
...
Problems with Android Fragment back stack
...can we prevent this behaviour without resorting to hacky ways like the one from DexterMoon, or the one from Nemanja using popBackStack which shows the Fragment while playing the transition animation?
– momo
Sep 27 '13 at 7:31
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Find where java class is loaded from
...rogrammaticly find out where the java classloader actually loads the class from?
11 Answers
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Shall we always use [unowned self] inside closure in Swift
...e class owns something that owns the closure.
Specifically in the example from the video
In the example on the slide, TempNotifier owns the closure through the onChange member variable. If they did not declare self as unowned, the closure would also own self creating a strong reference cycle.
Dif...
List comprehension vs. lambda + filter
...ue in Python. Even though Guido considered removing map, filter and reduce from Python 3, there was enough of a backlash that in the end only reduce was moved from built-ins to functools.reduce.
Personally I find list comprehensions easier to read. It is more explicit what is happening from the exp...
“Cross origin requests are only supported for HTTP.” error when loading a local file
.... (See Section 4 for full details.)
So even though your file originates from the same host (localhost), but as long as the scheme is different (http / file), they are treated as different origin.
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ImportError: DLL load failed: %1 is not a valid Win32 application. But the DLL's are there
...ndows Binaries for Python Extension Packages
you can find any python libs from here
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Why is it slower to iterate over a small string than a small list?
...ter strings are cached.
The difference is unobvious, but is likely created from a greater number of checks on string indexing, with regards to the type and well-formedness. It is also quite likely thanks to the need to check what to return.
List indexing is remarkably fast.
>>> python...
How to convert a PIL Image into a numpy array?
...uld be able to do either pic.putdata(pix) or create a new image with Image.fromarray(pix).
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How do you loop through each line in a text file using a windows batch file?
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A minor addition: to make this work from the command line interactively, replace %%A with %A in the above command. Otherwise you'll get %%A was unexpected at this time..
– vadipp
Nov 12 '12 at 12:02
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