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How do I reference a Django settings variable in my models.py?
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Try with this: from django.conf import settings then
settings.VARIABLE to access that variable.
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How to create an empty file at the command line in Windows?
...EMptyFile.txt
copy /b NUL EmptyFile.txt
"How to create empty text file from a batch file?" (2008) also points to:
type NUL > EmptyFile.txt
# also
echo. 2>EmptyFile.txt
copy nul file.txt > nul # also in qid's answer below
REM. > empty.file
fsutil file createnew file.cmd 0 # to create...
C# declare empty string array
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@newStackExchangeInstance, just copied code "as is" from the question. Both lines compile fine, although I agree that following one style is better.
– Andrei
May 30 '13 at 10:59
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String output: format or concat in C#?
...I'd go with the String.Format option, only because it makes the most sense from an architectural standpoint. I don't care about the performance until it becomes an issue (and if it did, I'd ask myself: Do I need to concatenate a million names at once? Surely they won't all fit on the screen...)
Con...
Most efficient way to store thousand telephone numbers
...structure: the first is a constant for the first five digits (17 bits); so from here on, each phone number has only the remaining five digits left. We view these remaining five digits as 17-bit binary integers and store k of those bits using one method and 17 - k = m with a different method, determi...
Flask-SQLalchemy update a row's information
...odel. Pickled attributes should be replaced in order to trigger updates:
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
from pprint import pprint
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqllite:////tmp/users.db'
db = SQLAlchemy(app)
class User(db.Mode...
Does Python optimize tail recursion?
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Or if you're going to transform it like that - just: from operator import add; reduce(add, xrange(n + 1), csum) ?
– Jon Clements♦
Nov 27 '12 at 20:10
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difference between each.with_index and each_with_index in Ruby?
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to allow wider usage with various enumerators.
to allow index to start from a number other than 0.
Today, using with_index would be better from the point of view of generality and readability, but from the point of view of speeding up the code, each_with_index runs slightly faster than each.wi...
C++ STL Vectors: Get iterator from index?
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@KerrekSB From 23.3.6.1 in the c++ standard draft: "The elements of a vector are stored contiguously, meaning that if v is a vector<T, Allocator> where T is some type other than bool, then it obeys the identity &v[n] == &...
CABasicAnimation resets to initial value after animation completes
..., your instance will be retained by the animation. So, after calling removeFromSuperview if you forget to remove/destroy the animation by yourself, dealloc for instance will not be called. You'll have a memory leak.
– emrahgunduz
Jan 22 '15 at 14:07
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