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Execute command without keeping it in history [closed]
...h history tips are available here including this method of hiding commands from history
– user379997
Dec 12 '11 at 14:38
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How to convert latitude or longitude to meters?
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For approximating short distances between two coordinates I used formulas from
http://en.wikipedia.org/wiki/Lat-lon:
m_per_deg_lat = 111132.954 - 559.822 * cos( 2 * latMid ) + 1.175 * cos( 4 * latMid);
m_per_deg_lon = 111132.954 * cos ( latMid );
.
In the code below I've left the raw numbers ...
Django: Get model from string?
...pplication loading system.
-- Scott Woodall
Found it. It's defined here:
from django.db.models.loading import get_model
Defined as:
def get_model(self, app_label, model_name, seed_cache=True):
share
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Is there a concurrent List in Java's JDK?
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Because the act of acquiring the position and getting the element from the given position naturally requires some locking (you can't have the list have structural changes between those two operations).
The very idea of a concurrent collection is that each operation on its own is atomic and...
Easiest way to compare arrays in C#
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Also for arrays (and tuples) you can use new interfaces from .NET 4.0: IStructuralComparable and IStructuralEquatable. Using them you can not only check equality of arrays but also compare them.
static class StructuralExtensions
{
public static bool StructuralEquals<T>(...
WWW or not WWW, what to choose as primary site name? [closed]
From technical perspective the only issue is traffic and incoming links (one of them should redirect to another).
14 Answe...
Django auto_now and auto_now_add
...cts I have written using Django, and so your save() would look like this:
from django.utils import timezone
class User(models.Model):
created = models.DateTimeField(editable=False)
modified = models.DateTimeField()
def save(self, *args, **kwargs):
''' On save, update ti...
How can I add remote repositories in Mercurial?
...an default-push is only necessary/useful if your usual push target differs from your usual pull source. If they're the same (or you never pull) then default suffices.
– Ry4an Brase
Jun 10 '12 at 0:18
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How to install python modules without root access?
...y running:
pip install --user package_name
Below is a more "manual" way from my original answer, you do not need to read it if the above solution works for you.
With easy_install you can do:
easy_install --prefix=$HOME/local package_name
which will install into
$HOME/local/lib/pythonX.Y/s...
Why are #ifndef and #define used in C++ header files?
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This prevent from the multiple inclusion of same header file multiple time.
#ifndef __COMMON_H__
#define __COMMON_H__
//header file content
#endif
Suppose you have included this header file in multiple files. So first time
__COMMON_H_...