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Django queries - id vs pk
...ry key field i.e. you don't need to care whether the primary key field is called id or object_id or whatever.
It also provides more consistency if you have models with different primary key fields.
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How can I fill out a Python string with spaces?
...idth=16,
)
Which results in (you guessed it):
'Hi '
And for all these, you can use python 3.6 f-strings:
message = 'Hi'
fill = ' '
align = '<'
width = 16
f'{message:{fill}{align}{width}}'
And of course the result:
'Hi '
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What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
...eral member functions that are implemented by the moc; if you get compiler errors along the lines of "undefined reference to vtable for LcdNumber", you have probably forgotten to run the moc or to include the moc output in the link command.
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iOS: How to store username/password within an app?
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Manuel PintaldiManuel Pintaldi
1,05588 silver badges88 bronze badges
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Should I declare Jackson's ObjectMapper as a static field?
...hey are fully immutable, thread-safe, meaning that it is not even theoretically possible to cause thread-safety issues (which can occur with ObjectMapper if code tries to re-configure instance).
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iOS 7's blurred overlay effect using CSS?
...e demo no longer works. The content goes below the phone, and I get the JS error "TypeError: sheet.addRule is not a function"
– BoffinBrain
Apr 29 '15 at 10:10
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What really is a deque in STL?
I was looking at STL containers and trying to figure what they really are (i.e. the data structure used), and the deque stopped me: I thought at first that it was a double linked list, which would allow insertion and deletion from both ends in constant time, but I am troubled by the promise made ...
gradle build fails on lint task
... butterknife library)
Solution is to disable aborting build on found lint errors
I took the inspiration from
https://android.googlesource.com/platform/tools/base/+/e6a5b9c7c1bca4da402de442315b5ff1ada819c7
(implementation:
https://android.googlesource.com/platform/tools/base/+/e6a5b9c7c1bca4da4...
How to forward declare a template class in namespace std?
and used that function in my main. I get errors. Of course, I know that there are more template params for std::list (allocator I think). But, that is beside the point. Do I have to know the full template declaration of a template class to be able to forward declare it?
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Deep copy of a dict in python
...ry from within my domain dictionary.
Without deepcopy I get the following error:
"RuntimeError: dictionary changed size during iteration"
...when I try to remove the desired element from my dictionary inside of another dictionary.
import socket
import xml.etree.ElementTree as ET
from copy impor...