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How do I migrate a model out of one django app and into a new one?
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In my case (Django 1.5.7 and South 1.0) .. I had to type python manage.py schemamigration specific create_cat --auto --freeze common to access to cat model from common app.
– geoom
Apr 21 '15 at 22:15
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pypi UserWarning: Unknown distribution option: 'install_requires'
...ed Nov 28 '11 at 15:38
Fredrik HåårdFredrik Håård
2,4622020 silver badges3232 bronze badges
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Precise Financial Calculation in JavaScript. What Are the Gotchas?
...ts instead of 25.50 dollars.
Consider that in JavaScript:
var result = 1.0 + 2.0; // (result === 3.0) returns true
But:
var result = 0.1 + 0.2; // (result === 0.3) returns false
The expression 0.1 + 0.2 === 0.3 returns false, but fortunately integer arithmetic in floating-point is e...
VSTS 2010 SGEN : error : Could not load file or assembly (Exception from HRESULT: 0x80131515)
...4.0 Tools
with this simple config as others have said
<?xml version ="1.0"?>
<configuration>
<runtime>
<loadFromRemoteSources enabled="true" />
</runtime>
</configuration>
share...
Why do Python's math.ceil() and math.floor() operations return floats instead of integers?
... of integers.
Consider: If floor() returned an integer, what should floor(1.0e30) return?
Now, while Python's integers are now arbitrary precision, it wasn't always this way. The standard library functions are thin wrappers around the equivalent C library functions.
...
How do I associate a Vagrant project directory with an existing VirtualBox VM?
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WARNING: The solution below works for Vagrant 1.0.x but not Vagrant 1.1+.
Vagrant uses the ".vagrant" file in the same directory as your "Vagrantfile" to track the UUID of your VM. This file will not exist if a VM does not exist. The format of the file is JSON. It looks...
Why do we use Base64?
...hat are random binary (ie sending an image in an email):
MIME-Version: 1.0
Content-Description: "Base64 encode of a.gif"
Content-Type: image/gif; name="a.gif"
Content-Transfer-Encoding: Base64
Content-Disposition: attachment; filename="a.gif"
Here we see that a GIF image is encoded i...
Read and write a String from text file
...h URL's (don't forget to handle the possible URL errors):
Swift 5+, 4 and 3.1
import Foundation // Needed for those pasting into Playground
let fileName = "Test"
let dir = try? FileManager.default.url(for: .documentDirectory,
in: .userDomainMask, appropriateFor: nil, create: true)
// If ...
Extract subset of key-value pairs from Python dictionary object?
...works in 2.7 too):
{k: bigdict[k] for k in ('l', 'm', 'n')}
Update: As Håvard S points out, I'm assuming that you know the keys are going to be in the dictionary - see his answer if you aren't able to make that assumption. Alternatively, as timbo points out in the comments, if you want a key tha...
Does PostgreSQL support “accent insensitive” collations?
... unaccent() always substitutes a single letter:
SELECT unaccent('Œ Æ œ æ ß');
unaccent
----------
E A e a S
You will love this update to unaccent in Postgres 9.6:
Extend contrib/unaccent's standard unaccent.rules file to handle all
diacritics known to Unicode, and expand ligatures cor...