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How to design a database for User Defined Fields?
...rocessed for aggregations or other transformations. Splitting the data out into multiple tables lets you perform some of the aggregating and other statistical analysis on the UDF data, then join that result to the master table via foreign key to get the non-aggregated attributes.
You can use table/c...
What is the fastest way to compare two sets in Java?
...me as the solution here except for the additional null checks. Java-11 Set Interface
– Chaithu Narayana
Jun 10 at 10:44
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How to initialize a list of strings (List) with many string values
...
For C++ CLI it is like: Collections::Generic::List<int>^ mylist = gcnew Collections::Generic::List<int>(gcnew array<int>{0, 1, 2, 3, 4})
– Rostfrei
Jun 21 '16 at 13:38
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Add Foreign Key to existing table
... (users), follow the following steps:
ALTER TABLE users ADD grade_id SMALLINT UNSIGNED NOT NULL DEFAULT 0;
ALTER TABLE users ADD CONSTRAINT fk_grade_id FOREIGN KEY (grade_id) REFERENCES grades(id);
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MySQL Insert into multiple tables? (Database normalization?)
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No, you can't insert into multiple tables in one MySQL command. You can however use transactions.
BEGIN;
INSERT INTO users (username, password)
VALUES('test', 'test');
INSERT INTO profiles (userid, bio, homepage)
VALUES(LAST_INSERT_ID(),'He...
Java - get the current class name?
...tClass().getEnclosingClass();
if (enclosingClass != null) {
System.out.println(enclosingClass.getName());
} else {
System.out.println(getClass().getName());
}
You can move that in some static utility method.
But note that this is not the current class name. The anonymous class is different cl...
Rolling median algorithm in C
...2)])} (k = 2*k2+1), computed very
efficiently.
The two algorithms are internally entirely different:
\describe{
\item{"Turlach"}{is the Härdle-Steiger
algorithm (see Ref.) as implemented by Berwin Turlach.
A tree algorithm is used, ensuring performance \eqn{O(n \log
k...
How can we generate getters and setters in Visual Studio?
...uto-implemented properties (this is merely syntactic sugar).
And
private int productID;
public int ProductID
{
get { return productID; }
set { productID = value; }
}
becomes
public int ProductID { get; set; }
...
Check if list contains any of another list
...n larger collections would be to project parameters to source and then use Intersect which internally uses a HashSet<T> so instead of O(n^2) for the first approach (the equivalent of two nested loops) you can do the check in O(n) :
bool hasMatch = parameters.Select(x => x.source)
...
reading from app.config file
...ttings instead (you will need to add a reference to System.Configuration)
int value = Int32.Parse(ConfigurationManager.AppSettings["StartingMonthColumn"]);
If you still have problems reading in your app settings then check that your app.config file is named correctly. Specifically, it should be n...