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How to set a Django model field's default value to a function call / callable (e.g., a date relative
...u are not defining a function, so function default values are irrelevant:
from datetime import datetime, timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=datetime.now() + timedelta(days=1))
This last line is not defining a function; it ...
Change SQLite database mode to read-write
How can I change an SQLite database from read-only to read-write?
14 Answers
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What is Mocking?
... internal parts) or a plastic banana in front of it. You can save yourself from investing in 1000 real laptops and rotting bananas.
The point is you're not trying to test if the banana is fake or not. Nor testing if the laptop is fake or not. All you're doing is testing if your machine once it sees ...
How do I remove an item from a stl vector with a certain value?
...
std::remove does not actually erase the element from the container, but it does return the new end iterator which can be passed to container_type::erase to do the REAL removal of the extra elements that are now at the end of the container:
std::vector<int> vec;
// ....
How do I convert between big-endian and little-endian values in C++?
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__builtin_bswapX is only available from GCC-4.3 onwards
– Matt Joiner
Dec 17 '09 at 4:18
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What are the differences between ArrayList and Vector?
... element. Structural modification means addition or deletion of element(s) from the list. Setting the value of an existing element is not a structural modification.
Collections.synchronizedList is normally used at the time of creation of the list to avoid any accidental unsynchronized access to the...
“Unsafe JavaScript attempt to access frame with URL…” error being continuously generated in Chrome w
... hmm that's intriguing...is there a way to set the option that way aside from the command line? I tried this from the command line: /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --disable-web-security and it seemed to work! but it said it wasn't able to load my profile...any idea ...
C++ auto keyword. Why is it magic?
From all the material I used to learn C++, auto has always been a weird storage duration specifier that didn't serve any purpose. But just recently, I encountered code that used it as a type name in and of itself. Out of curiosity I tried it, and it assumes the type of whatever I happen to assig...
What is the real overhead of try/catch in C#?
... a good way of controlling process flow, but where does this overhead come from and what is it's actual impact?
12 Answers
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How different is Objective-C from C++? [closed]
...t allow objects to be created on the stack - all objects must be allocated from the heap (either explicitly with an alloc message, or implicitly in an appropriate factory method).
Like C++, Objective-C has both structs and classes. However, where in C++ they are treated as almost exactly the same, i...