大约有 43,000 项符合查询结果（耗时：0.0647秒） [XML]
Why should I use the keyword “final” on a method parameter in Java?
I can't understand where the final keyword is really handy when it is used on method parameters.
12 Answers
...
What is the Python 3 equivalent of “python -m SimpleHTTPServer”
....server in Python 3.0. The 2to3 tool will automatically adapt imports when converting your sources to 3.0.
So, your command is python -m http.server, or depending on your installation, it can be:
python3 -m http.server
s...
What is the difference between syntax and semantics in programming languages?
What is the difference between syntax and semantics in programming languages (like C, C++)?
10 Answers
...
C# “as” cast vs classic cast [duplicate]
... thrown. With the as method, it results in null, which can be checked for, and avoid an exception being thrown.
Also, you can only use as with reference types, so if you are typecasting to a value type, you must still use the "classic" method.
Note:
The as method can only be used for types that c...
ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type
In a nutshell the exception is thrown during POSTing wrapper model and changing the state of one entry to 'Modified'. Before changing the state, the state is set to 'Detached' but calling Attach() does throw the same error. I'm using EF6.
...
How many String objects will be created when using a plus sign?
...;
Furthermore, the compiler will remove extraneous constant expressions, and only emit them if they are used or exposed. For instance, this program:
const String one = "1";
const String two = "1";
const String result = one + two + "34";
public static void main(string[] args) {
Console.Out.W...
How to declare a structure in a header that is to be used by multiple files in c?
...each source file needed it.
The right way is putting it in an header file, and include this header file whenever needed.
shall we open a new header file and declare the structure there and include that header in the func.c?
This is the solution I like more, because it makes the code highly modular. ...
Overriding superclass property with different type in Swift
...properties. Instead you can create an extra variable in the subclass that handles the new class type:
class Chassis {}
class RacingChassis : Chassis {}
class Car {
var chassis = Chassis()
}
class RaceCar: Car {
var racingChassis = RacingChassis()
override var chassis: Chassis {
...
Ways to eliminate switch in code [closed]
...
-1: I've never used a switch statement with typeof, and this answer doesn't suggest ways or reasons to work around switch statements in other situations.
– Kevin
Jun 18 '13 at 21:00
...
Is there an alternative to string.Replace that is case-insensitive?
I need to search a string and replace all occurrences of %FirstName% and %PolicyAmount% with a value pulled from a database. The problem is the capitalization of FirstName varies. That prevents me from using the String.Replace() method. I've seen web pages on the subject that suggest
...