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Execute code when Django starts ONCE only?
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Update from Pykler's answer below: Django 1.7 now has a hook for this
Don't do it this way.
You don't want "middleware" for a one-time startup thing.
You want to execute code in the top-level urls.py. That module is imported and executed once.
urls.py
from django...
What is the difference between
... i have met somewhere in code this variant else <%== %> does anyone know what is it?
– okliv
Jul 11 '12 at 17:03
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How can I reverse a list in Python?
...,2,3,4]
a = a[::-1]
print(a)
>>> [4,3,2,1]
The job is done, and now you have a reversed list.
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Obtaining a powerset of a set in Java
...tains() would be O(n), etc.
Do you really need this?
EDIT:
This code is now available in Guava, exposed through the method Sets.powerSet(set).
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ViewController respondsToSelector: message sent to deallocated instance (CRASH)
...o show object that was called after it was deallocated.
You should see now every call that has changed retain count of this object. This could be because sending directly retain/release messages as well as draining autorelease pools or inserting into NSArrays.
RefCt column shows retainCount aft...
How to remove the lines which appear on file B from another file A?
...e a set, where there won't be any duplicate values (keys)
!($0 in a) we're now in the next file(s), in is a contains test, here it's checking whether current line is in the set we populated in the first step from the first file, ! negates the condition. What is missing here is the action, which by...
“unrecognized selector sent to instance” error in Objective-C
...auses the numberButtonClicked: method to be sent to another object that is now occupying the memory that the view controller was previously occupying...
Make sure you're properly retaining/releasing your view controller.
sh...
SVN checkout ignore folder
.../project
cd project
svn update --set-depth=exclude docs
rm -fr docs
From now on any updates to the working copy won't repopulate the docs folder.
See http://blogs.collab.net/subversion/2009/03/sparse-directories-now-with-exclusion/ and http://subversion.apache.org/docs/release-notes/1.6.html#spar...
What is the use of hashCode in Java?
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Thank you Aishu. Now I got clear knowledge about the hashcode with bucket related explanation.
– Balasubramani
May 16 '15 at 3:02
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What is the difference between visibility:hidden and display:none?
...the line. Everyone in line will then move forward one position to fill the now empty slot. This is like display:none.
Contrast this with the similar situation, but that someone in front of you puts on an invisibility cloak. While viewing the line, it will look like there is an empty space, but peop...