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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...
Check if user is using IE
... /Edge\/|Trident\/|MSIE /.test(window.navigator.userAgent) I know this works on 10 and 11. If you can verify <IE9 and Edge, edit answer.
– Indolering
May 5 '15 at 23:59
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How do I convert a dictionary to a JSON String in C#?
...rt my Dictionary<int,List<int>> to JSON string. Does anyone know how to achieve this in C#?
13 Answers
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How to remove old Docker containers
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Updated Answer
Use docker system prune or docker container prune now. See VonC's updated answer.
Previous Answer
Composing several different hints above, the most elegant way to remove all non-running containers seems to be:
docker rm $(docker ps -q -f status=exited)
-q prints just the...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
... itself manages the scheduling and context switches, this makes sense. But now I have a rough imagination about what the mutex lock/unlock will do internally.
– Albert
Sep 6 '10 at 21:55
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Google Maps v3 - limit viewable area and zoom level
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Now this is surely the best way to restrict the zoom level. When I was writing the post the feature wasn't present in Maps API v3. Thankfully, they keep improving the API.
– Tomik
Mar 5 ...
Why can't we have static method in a (non-static) inner class?
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I know an inner class is associated with an instance of its outer class and I know that it's kinda useless that we become able to declare static members within an inner class but I am still asking why not an inner class can decl...
The “unexpected ++” error in jslint [duplicate]
...meone comes along and moves the space?
var i = 0, j = 0;
alert(i+ ++j);
Now this first increments j, and then adds i to the new value of j, resulting in 1 being alerted.
This could easily be solved by doing
var i = 0, j = 0;
alert((i++) +j);
Now this cannot be mistaken.
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How to hide element using Twitter Bootstrap and show it using jQuery?
...d like so :
<div id="header-mask" class="hideMe"></div>
and now jQuery hiding works
$('#header-mask').show();
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How do you Encrypt and Decrypt a PHP String?
... library written by and reviewed by cryptography experts.
Update: PHP 7.2 now provides libsodium! For best security, update your systems to use PHP 7.2 or higher and only follow the libsodium advice in this answer.
Use libsodium if you have PECL access (or sodium_compat if you want libsodium witho...