大约有 30,000 项符合查询结果（耗时：0.0355秒） [XML]
Is it better to call ToList() or ToArray() in LINQ queries?
I often run into the case where I want to eval a query right where I declare it. This is usually because I need to iterate over it multiple times and it is expensive to compute. For example:
...
How to initialize const member variable in a class?
When I am trying to initialize the const member variable t with 100. But it's giving me the following error:
11 Answers
...
Apply a function to every row of a matrix or a data frame
Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R?
...
Hidden Features of Java
... of
java -classpath ./lib/log4j.jar:./lib/commons-codec.jar:./lib/commons-httpclient.jar:./lib/commons-collections.jar:./lib/myApp.jar so.Main
See http://java.sun.com/javase/6/docs/technotes/tools/windows/classpath.html
s...
Null check in an enhanced for loop
What is the best way to guard against null in a for loop in Java?
11 Answers
11
...
Saving changes after table edit in SQL Server Management Studio
...at require table re-creation”.
Here is a very good explanation on this:
http://blog.sqlauthority.com/2009/05/18/sql-server-fix-management-studio-error-saving-changes-in-not-permitted-the-changes-you-have-made-require-the-following-tables-to-be-dropped-and-re-created-you-have-either-made-changes-t...
Avoiding instanceof in Java
... }
}
}
More info on usage of variables of type Class in Java: http://docs.oracle.com/javase/tutorial/reflect/class/classNew.html
share
|
improve this answer
|
fo...
How do I use a custom deleter with a std::unique_ptr member?
I have a class with a unique_ptr member.
6 Answers
6
...
Does C# have extension properties?
Does C# have extension properties?
6 Answers
6
...
Move all files except one
How can I move all files except one? I am looking for something like:
14 Answers
14
...