大约有 40,000 项符合查询结果（耗时：0.0533秒） [XML]
Linq with group by having count
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Like this:
from c in db.Company
group c by c.Name into grp
where grp.Count() > 1
select grp.Key
Or, using the method syntax:
Company
.GroupBy(c => c.Name)
.Where(grp => grp.Count() > 1)
.Select(grp => grp.Key);
...
Kill a Process by Looking up the Port being used by it from a .BAT
...ter name, e.g. %V.
"tokens=4 delims= "
This lets you split up each line by whitespace, and take the 4th chunk in that line, and stuffs it into %variable (in our case, %%P). delims looks empty, but that extra space is actually significant.
netstat -a -n -o
Just run it and find out. According ...
Why is this program erroneously rejected by three C++ compilers?
...mpiler vendor supports (canonically defined) text files: any file produced by a text editor, typically a series of characters.
Note that the C++ standard is based off the C standard (§1.1/2), and the C(99) standard says, in §1.2:
This International Standard does not specify
— the mecha...
Split Java String by New Line
...'m trying to split text in a JTextArea using a regex to split the String by \n However, this does not work and I also tried by \r\n|\r|n and many other combination of regexes.
Code:
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Reason to Pass a Pointer by Reference in C++?
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You would want to pass a pointer by reference if you have a need to modify the pointer rather than the object that the pointer is pointing to.
This is similar to why double pointers are used; using a reference to a pointer is slightly safer than using point...
Understanding garbage collection in .NET
...ow the garbage collector discovers local variables and how that's affected by having a debugger present.
First off, the jitter performs two important duties when it compiles the IL for a method into machine code. The first one is very visible in the debugger, you can see the machine code with the ...
Group by in LINQ
...basically want:
var results = from p in persons
group p.car by p.PersonId into g
select new { PersonId = g.Key, Cars = g.ToList() };
Or as a non-query expression:
var results = persons.GroupBy(
p => p.PersonId,
p => p.car,
(key, g) => new { Perso...
Service vs IntentService in the Android platform
...ded (Intent triggered tasks).
How to trigger?
The Service is triggered by calling method startService().
The IntentService is triggered using an Intent, it spawns a new worker thread and the method onHandleIntent() is called on this thread.
Triggered From
The Service and IntentService may be...
How do I increase the scrollback buffer in a running screen session?
...an page explains that you can enter command line mode in a running session by typing Ctrl+A, :, then issuing the scrollback <num> command.
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GitHub - List commits by author
Is there any way on GitHub to list all commits made by a single author, in the browser (neither locally, e.g. via git log , nor via the API)?
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