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Unique fields that allow nulls in Django
...ULL just after it comes out of the database, and the rest of Django won't know/care. A quick and dirty example:
from django.db import models
class CharNullField(models.CharField): # subclass the CharField
description = "CharField that stores NULL but returns ''"
__metaclass__ = models.S...
How to create a temporary directory/folder in Java?
...
This is dangerous. Java is known not to delete files immediately, so mkdir may fail sometimes
– Demiurg
Dec 1 '10 at 8:15
4
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How to Free Inode Usage?
...ding the files open.
If you do that and you still have a problem, let us know.
By the way, if you're looking for the directories that contain lots of files, this script may help:
#!/bin/bash
# count_em - count files in all subdirectories under current directory.
echo 'echo $(ls -a "$1" | wc -l) $...
What exactly does += do in python?
I need to know what += does in python. It's that simple. I also would appreciate links to definitions of other short hand tools in python.
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Why does AuthorizeAttribute redirect to the login page for authentication and authorization failures
...ASP.NET MVC 1 was released the behavior of AuthorizeAttribute was correct. Now, the behavior is incorrect - the HTTP/1.1 specification was fixed.
Rather than attempt to change ASP.NET's login page redirects, it's easier just to fix the problem at the source. You can create a new attribute with the ...
How to change line color in EditText
... android:backgroundTint="@android:color/holo_red_light" />
Update 3
Now We have with back support AppCompatEditText
Note: We need to use app:backgroundTint instead of android:backgroundTint
<android.support.v7.widget.AppCompatEditText
android:layout_width="match_parent"
android:layou...
Changing MongoDB data store directory
Until now I have not been specifying a MongoDB data directory and have had only one 30 GB primary partition.
9 Answers
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What's the point of NSAssert, actually?
...orce that:
void gimme_positive_ints(int i) {
assert(i > 0);
}
And now you'll see something like this in the error log (or STDERR):
Assertion i > 0 failed: file example.c, line 2
So not only does it safe-guard against potentially bad inputs but it logs them in a useful, standard way. ...
Uncaught ReferenceError: $ is not defined?
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@Uzbekjon almost 10 years now and it still isn't ticked. Thanks for providing the article link.
– Modo
Dec 25 '19 at 7:25
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How do I set/unset a cookie with jQuery?
....removeCookie('foo') for deleting a cookie, using $.cookie('foo', null) is now deprecated"
– bogdan
Jan 7 '13 at 3:57
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