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How can I use interface as a C# generic type constraint?
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{
SomeClass<IMyInterface> myMember; // or a property, method, etc.
}
Basically this involves scanning all types, inheritance, members, parameters, etc, etc, etc. If a type is a generic type and has a constraint, we check the constraint; if it's an array, we check the element type.
A...
What is the difference between SQL, PL-SQL and T-SQL?
... management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc.
PL/SQL is a proprietary procedural language used by Oracle
PL/pgSQL is a procedural language used by PostgreSQL
TSQL is a proprietary procedural language used by Microsoft in SQL Server.
Procedural languages are design...
Why is the default value of the string type null instead of an empty string?
...r null before I can safely apply methods like ToUpper() , StartWith() etc...
14 Answers
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Just what is Java EE really? [closed]
...scanned only once for all your classes instead of every library (EJB, JPA, etc) doing this scanning over and over itself. Also because of that, CDI annotations can be applied to EJB beans and JPA entity managers can be injected into them.
Why do I need something massive as JBoss just to compile sim...
Get list of all routes defined in the Flask app
I have a complex Flask-based web app. There are lots of separate files with view functions. Their URLs are defined with the @app.route('/...') decorator. Is there a way to get a list of all the routes that have been declared throughout my app? Perhaps there is some method I can call on the ap...
C++ mark as deprecated
...his will trigger a compile-time warning when that function is used in a .c file.
You can find more info under "Diagnostic pragmas" at
http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html
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NSUserDefaults - How to tell if a key exists
...:' reference means just that: the object. NOT the key. IOW, in your header file if you've defined: #define kMyKey @"myKey" the 'containsObject' is not looking for 'kMyKey', it's looking for 'myKey'. Using 'kMyKey' will always return 'NO.'
– Bill Norman
Jul 19 '...
Understand homebrew and keg-only dependencies
...hat depends on it has to be compiled with specific instructions to use the files in /usr/local/Cellar. That's done automatically by brew install when a formula specifies keg-only dependencies.
Formulas that specify keg-only dependencies make sure that the equivalent system libraries are not used. Y...
What are WSDL, SOAP and REST?
.... However, in this case the class does not exist in the local applications file system, but at a remote site accessed over http."
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"If we think of using a SOAP service as just another PHP class then the WSDL document is a list of all the available class methods and properties. "
http://www.double...
Difference Between Invoke and DynamicInvoke
...er! If you just know that it is Delegate, it has to resolve the parameters etc manually - this might involve unboxing, etc - a lot of reflection is going on. For example:
Delegate slowTwice = twice; // this is still the same delegate instance
object[] args = { i };
object result = slowTwice.Dynamic...