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Computed / calculated / virtual / derived columns in PostgreSQL
... MS SQL Server? I can't find anything in the docs, but as this feature is included in many other DBMSs I thought I might be missing something.
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What is the difference between _tmain() and main() in C++?
...PCTSTR resolves to either LPCSTR or LPCWSTR, and for every other type that includes char or wchar_t, a -T- version always exists which can be used instead.
Note that all of this is Microsoft specific. TCHAR is not a standard C++ type, it is a macro defined in windows.h. wmain and _tmain are also de...
How to convert TimeStamp to Date in Java?
...s exclusive. So a day starts with its first moment and runs up to, but not including, the first moment of the next day.
ZonedDateTime zdtStop = ld.plusDays( 1 ).atStartOfDay( z ) ; // Determine the following date, and ask for the first moment of that day.
Our query for an entire day cannot make ...
How to print without newline or space?
... for two reasons: it has undesirable side effects which you can't disable (included extra spaces), and It isn't forward compatible with python 3 (the parenthesis force a conversion to a tuple). I expect these sorts of shoddy constructs from PHP, not Python. So it's best to not ever use this.
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When to use valueChangeListener or f:ajax listener?
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Is it possible to dynamically compile and execute C# code fragments?
...System.CodeDom, there are objects to represent all the artifacts that code includes - an object for a class, for an interface, for a constructor, a statement, a property, a field, and so on. I can then construct code using that object model. What is shown here in this answer is compiling a code fi...
ASP.NET Web Site or ASP.NET Web Application?
...he Web Application Project, the project just
keeps track of which files to include/exclude from the project view without
renaming them, making things much tidier.
Reference
The article ASP.NET 2.0 - Web Site vs Web Application project also gives reasons on why to use one and not the other. Here i...
Trim spaces from start and end of string
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Note: As of 2015, all major browsers (including IE>=9) support String.prototype.trim(). This means that for most use cases simply doing str.trim() is the best way of achieving what the question asks.
Steven Levithan analyzed many different implementation o...
How do I generate random number for each row in a TSQL Select?
...er at the end of the expression. Be extra careful if you need a range that includes both positive and negative numbers. If you do it wrong, it's possible to double-count the number 0.
A small warning for the math nuts in the room: there is a very slight bias in this code. CHECKSUM() results in numb...
What's the difference between encoding and charset?
...t sounds like, a set of characters. There are a large number of charsets, including many that are intended for particular scripts or languages.
However, we are well along the way in the transition to Unicode, which includes a character set capable of representing almost all the world's scripts. ...