大约有 48,000 项符合查询结果（耗时：0.0728秒） [XML]
Linq code to select one item
...ion methods directly like:
var item = Items.First(i => i.Id == 123);
And if you don't want to throw an error if the list is empty, use FirstOrDefault which returns the default value for the element type (null for reference types):
var item = Items.FirstOrDefault(i => i.Id == 123);
if (ite...
How to “return an object” in C++?
...t of the problem (I know the difference between having things on the stack and putting them on the heap).
8 Answers
...
What is the difference between --save and --save-dev?
...
Shorthand versions: -D is short for --save-dev and -S is short for --save
– chrisco
Mar 26 '17 at 14:07
...
The SQL OVER() clause - when and why is it useful?
I read about that clause and I don't understand why I need it.
What does the function Over do? What does Partitioning By do?
Why can't I make a query with writing Group By SalesOrderID ?
...
Under what circumstances is an SqlConnection automatically enlisted in an ambient TransactionScope T
...onnection to be "enlisted" in a transaction? Does it simply mean that commands I execute on the connection will participate in the transaction?
...
Why / when would it be appropriate to override ToString?
I'm studying C# and I wonder what the point and benefit of overriding ToString might be, as shown in the example below.
1...
How to edit multi-gigabyte text files? Vim doesn't work =( [closed]
... loading small portions into memory at once? It doesn't seem like Vim can handle it =(
15 Answers
...
CSS selector for other than the first child and last child
...it possible to select all the other children except for the :first-child and the :last-child ? I know there is a :not() selector but it doesn't work with more than one not in the parentheses. This is what I have:
...
How to call Makefile from another Makefile?
...rom another. I have two makefiles, one called /path/to/project/makefile and one called /path/to/project/gtest-1.4.0/make/Makefile . I'm attempting to have the former call the latter. In /path/to/project/makefile, I have
...
What exactly does the Access-Control-Allow-Credentials header do?
I'm trying to understand how to use CORS and am confused about what the Access-Control-Allow-Credentials header does.
1 A...