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Is it better to return null or empty collection?
...ollection is passed, or no table at all, if null is passed.
in a Object-to-XML (JSON/whatever), where null would mean the element is missing, while an empty collection would render a redundant (and possibly incorrect) <collection />
you are using or implementing an API which explicitly states ...
What are .dex files in Android?
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My jar file contains some xml in assets folder. I want this to be a part of .dex Any idea how to implement this ?
– AndroidGuy
Apr 15 '13 at 11:42
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Two way/reverse map [duplicate]
I'm doing this switchboard thing in python where I need to keep track of who's talking to whom, so if Alice --> Bob, then that implies that Bob --> Alice.
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Split string based on a regular expression
...gt;>> str1.split()
['a', 'b', 'c', 'd']
Docs are here: http://docs.python.org/library/stdtypes.html#str.split
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Gradients in Internet Explorer 9
...et($_GET['to']) ? $_GET['to'] : '000000';
header('Content-type: image/svg+xml; charset=utf-8');
echo '<?xml version="1.0"?>
';
?>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%">
<defs>
<linearGradient id="linear-gradient" x1="0...
java.net.URLEncoder.encode(String) is deprecated, what should I use instead?
...thods. It would take the same amount of effort to type either. If you like Python, why are you programming in Java? Is it because more people use Java than Python and you got a Java job instead of Python job?
– stepanian
Feb 27 '12 at 9:07
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Determine if 2 lists have the same elements, regardless of order? [duplicate]
...are unique) as well as hashable (which strings and other certain immutable python objects are), the most direct and computationally efficient answer uses Python's builtin sets, (which are semantically like mathematical sets you may have learned about in school).
set(x) == set(y) # prefer this if e...
Passing HTML to template using Flask/Jinja2
...is a Jinja2 class, yes. It implements a common interface supported by many python libraries (unfortunately not Django). You can also use the markup safe package that implements the same object: pypi.python.org/pypi/MarkupSafe
– Armin Ronacher
Jul 18 '10 at 9:0...
Principal component analysis in Python
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Months later, here's a small class PCA, and a picture:
#!/usr/bin/env python
""" a small class for Principal Component Analysis
Usage:
p = PCA( A, fraction=0.90 )
In:
A: an array of e.g. 1000 observations x 20 variables, 1000 rows x 20 columns
fraction: use principal components that...
partial string formatting
...test and most readable solution, but also describes the coder's intention. Python3 version: python from functool import partial s = "{foo} {bar}".format s_foo = partial(s, foo="FOO") print(s_foo(bar="BAR")) # FOO BAR print(s(foo="FOO", bar="BAR")) # FOO BAR
– Paul Brown
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