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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
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Origin null is not allowed by Access-Control-Allow-Origin
...simple web server and test via http:// URLs instead. That gives you a much more accurate security picture.
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How to automate createsuperuser on django?
... the AUTH_USER_MODEL setting has been changed to a different user model. A more generic way to create the user would be:
echo "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('admin', 'admin@myproject.com', 'password')" | python manage.py shel...
How Do I 'git fetch' and 'git merge' from a Remote Tracking Branch (like 'git pull')
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More details: git fetch origin an-other-branch stores the fetched tip in FETCH_HEAD, but not origin/an-other-branch (i.e. the usual ‘remote tracking branch’). So, one could do git fetch origin an-other-branch && ...
Finding # occurrences of a character in a string in Ruby
... number of a's:
puts "Melanie is a noob".count('a') #=> 2
Docs for more details.
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What is the preferred Bash shebang?
...me thing on every platform. As of 2012 through 2018 /usr/bin/env exists on more machines than either of /bin/bash xor /usr/bin/bash, so a script that starts with this line will do the expected thing on as many machines as possible.
– l0b0
Mar 8 '18 at 20:28
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Why Would I Ever Need to Use C# Nested Classes [duplicate]
...ight need to be used from without the assembly/library, then it is usually more convenient to the user to define it as a separate (sibling) class, whether or not there is any conceptual relationship between the two classes. Even though it is technically possible to create a public class nested withi...
Warning: Null value is eliminated by an aggregate or other SET operation in Aqua Data Studio
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Using COUNT([uid]) IS a valid way of counting, and the warning is nothing more than a warning. However if you are concerned, and you want to get a true count of uids in this case then you could use:
SUM(CASE WHEN [uid] IS NULL THEN 0 ELSE 1 END) AS [new_count]
This would not add a lot of overhe...
Purpose of Python's __repr__
...ssible to create this object. See official documentation here. __repr__ is more for developers while __str__ is for end users.
A simple example:
>>> class Point:
... def __init__(self, x, y):
... self.x, self.y = x, y
... def __repr__(self):
... return 'Point(x=%s, y=%s)' % (s...
Typedef function pointer?
...to be really tricky with pointers to functions arrays, and some other even more indirect flavors.
To answer your three questions
Why is typedef used?
To ease the reading of the code - especially for pointers to functions, or structure names.
The syntax looks odd (in the pointer to function decla...