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Real world example about how to use property feature in python?
...calls, etc
# all results in an angle set in 'some_angle'
# It could also reference a cache, remote or otherwise,
# that holds the latest value for this angle
return some_angle
>>> f = PDB_Calculator()
>>> angle = f.protein_folding_angle
>>>...
Order Bars in ggplot2 bar graph
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The key with ordering is to set the levels of the factor in the order you want. An ordered factor is not required; the extra information in an ordered factor isn't necessary and if these data are being used in any statistical model, t...
How to import classes defined in __init__.py
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'lib/'s parent directory must be in sys.path.
Your 'lib/__init__.py' might look like this:
from . import settings # or just 'import settings' on old Python versions
class Helper(object):
pass
Then the following example should work:
from lib.settings import Values
from lib i...
Parsing query strings on Android
... deprecated in L, and removed in M.
So the best answer now is UrlQuerySanitizer. This has existed since API level 1 and still exists. It also makes you think about the tricky issues like how do you handle special characters, or repeated values.
The simplest code is
UrlQuerySanitizer.ValueSaniti...
The “backspace” escape character '\b': unexpected behavior?
So I'm finally reading through K&R , and I learned something within the first few pages, that there is a backspace escape character, \b .
...
PostgreSQL function for last inserted ID
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( tl;dr : goto option 3: INSERT with RETURNING )
Recall that in postgresql there is no "id" concept for tables, just sequences (which are typically but not necessarily used as default values for surrogate primary keys, with the SERIAL pseudo-type).
If you...
Allow CORS REST request to a Express/Node.js application on Heroku
I've written a REST API on the express framework for node.js that works for requests from the js console in Chrome, and URL bar, etc. I'm now trying to get it working for requests from another app, on a different domain (CORS).
...
What is the best Battleship AI?
...eeded to do 1000 games to get any reasonable distinction between test algorithms.
Download Dreadnought 1.2.
Strategies:
keep track of all possible positions for ships that have >0 hits. The list never gets bigger than ~30K so it can be kept exactly, unlike the list of all possible positions ...
Getting the first index of an object
...them to enumerate in the same order that they are specified in the object literal—there is no "first" property.
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Will using goto leak variables?
Is it true that goto jumps across bits of code without calling destructors and things?
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