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Virtual/pure virtual explained
... be overridden in a derived class, but the "new" version will only be used by the derived class and below, but will not change the functionality of the base class at all.
whereas..
A pure virtual function or pure virtual method is a virtual function that is required to be implemented by a deriv...
How unique is UUID?
...ems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a pattern of some type to alleviate this issue?
...
What is the best way to paginate results in SQL Server
...ing with is
SELECT * FROM Orders WHERE OrderDate >= '1980-01-01' ORDER BY OrderDate
In this case, you would determine the total number of results using:
SELECT COUNT(*) FROM Orders WHERE OrderDate >= '1980-01-01'
...which may seem inefficient, but is actually pretty performant, assuming ...
how do you filter pandas dataframes by multiple columns
To filter a dataframe (df) by a single column, if we consider data with male and females we might:
6 Answers
...
Precise Financial Calculation in JavaScript. What Are the Gotchas?
...
You should probably scale your decimal values by 100, and represent all the monetary values in whole cents. This is to avoid problems with floating-point logic and arithmetic. There is no decimal data type in JavaScript - the only numeric data type is floating-point. The...
How to get element by classname or id
I am trying to find the element in html by angularjs.
4 Answers
4
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What's the difference between @JoinColumn and mappedBy when using a JPA @OneToMany association
...n with a foreign key to the referenced table), whereas the attribute mappedBy indicates that the entity in this side is the inverse of the relationship, and the owner resides in the "other" entity. This also means that you can access the other table from the class which you've annotated with "mapped...
Can you write virtual functions / methods in Java?
...
From wikipedia
In Java, all non-static methods are by
default "virtual functions." Only
methods marked with the keyword final,
which cannot be overridden, along with
private methods, which are not
inherited, are non-virtual.
...
Repeat String - Javascript
...blem is a well-known / "classic" optimization issue for JavaScript, caused by the fact that JavaScript strings are "immutable" and addition by concatenation of even a single character to a string requires creation of, including memory allocation for and copying to, an entire new string.
Unfortunate...
How do I write LINQ's .Skip(1000).Take(100) in pure SQL?
...ders AS
(
SELECT SalesOrderID, OrderDate,
ROW_NUMBER() OVER (ORDER BY OrderDate) AS 'RowNumber'
FROM Sales.SalesOrderHeader
)
SELECT *
FROM OrderedOrders
WHERE RowNumber BETWEEN 51 AND 60; --BETWEEN is inclusive
...