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How can I define a composite primary key in SQL?
...matically create an index on the primary key, but since it is not required by any standard, there might be corner cases out there.
– To마SE
Oct 5 '16 at 9:04
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How to redirect from OnActionExecuting in Base Controller?
...xt.Result, then the redirect happens before the action executes. (Verified by personal testing/debugging.)
– James
Apr 22 '13 at 19:56
39
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Drop a temporary table if it exists
...
@TobySpeight - the question is about temporary tables. Most of these points are of limited relevance to that.
– Martin Smith
May 17 '17 at 15:49
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How do Python functions handle the types of the parameters that you pass in?
...swers have done a good job at explaining duck typing and the simple answer by tzot:
Python does not have variables, like other languages where variables have a type and a value; it has names pointing to objects, which know their type.
However, one interesting thing has changed since 2010 (when...
How to empty a redis database?
...onger it will take to flush. Since numbered (shared) databases are managed by the same Redis server, this could block your other databases for that duration. If possible, refrain from using shared databases because of that and also because they aren't future-proof (not supported in v3). See here for...
Force add despite the .gitignore file
...d -p foo # works (cannot paste newlines in comment, execute the commands 1 by 1
– Daniel Böhmer
Nov 5 '11 at 10:26
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Excluding directories in os.walk
...ng dirs in-place will prune the (subsequent) files and directories visited by os.walk:
# exclude = set(['New folder', 'Windows', 'Desktop'])
for root, dirs, files in os.walk(top, topdown=True):
dirs[:] = [d for d in dirs if d not in exclude]
From help(os.walk):
When topdown is true, the calle...
How to navigate through a vector using iterators? (C++)
...:vector<int> v = {0, 1, 2, 3, 4, 5};
for (auto i : v)
{
// access by value, the type of i is int
std::cout << i << ' ';
}
std::cout << '\n';
See here for variations: https://en.cppreference.com/w/cpp/language/range-for
...
How can you program if you're blind?
...uestion was around configuring the environment, I think it's best answered by looking at how a blind person would use a computer.
Some people use a talking environment, such as T. V. Raman and the Emacspeak environment mentioned in other answers. The more common solution by far is to have a screen ...
Invoking a static method using reflection
...
Sometimes it's much easier to loop and find the method by name than to use getMethod because getMethod (or getDeclaredMethod) requires that you work out the parameter types in great detail. It just depends if micro efficiency matters - Java iteration is very quick so unless you...