大约有 45,000 项符合查询结果（耗时：0.0496秒） [XML]
What's the best manner of implementing a social activity stream? [closed]
...
Smallish in this case is such that "select * from events where event.is visible for this user" returns a result in less than a second or two- figure a few hundred thousand rows worth of events.
– Tim Howland
May 26 '09 at ...
What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?
...h
declare @error int, @message varchar(4000), @xstate int;
select @error = ERROR_NUMBER(), @message = ERROR_MESSAGE(), @xstate = XACT_STATE();
if @xstate = -1
rollback;
if @xstate = 1 and @trancount = 0
rollback
if @xstate = 1 and @tran...
How to avoid null checking in Java?
...t that it cannot be null, and that's it.
Example:
public String getFirst3Chars(String text) {
return text.subString(0, 3);
}
However, if your method just passes the value on, and the next method passes it on etc. it could get problematic. In that case you may want to check the argument as abov...
Member initialization while using delegated constructor
...tializer; the constructor is a delegating constructor, and the constructor selected by the is the target constructor. [...]
You can work-around this by defining the version of the constructor that takes arguments first:
Tokenizer::Tokenizer(std::stringstream *lines)
: lines(lines)
{
}
and th...
Why does installing Nokogiri on Mac OS fail with libiconv is missing?
...ed to install xCode command tools to allow you to install libiconv.
xcode-select --install
then install a newer version of libiconv
brew install libiconv
then install your gem
gem install nokogiri -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14
...
Change font size macvim?
...s - you can use set guifont=* which will bring up a font-picker for you to select from the available fonts on the system. It might be OSX and Linux only, but preferable to having to enter it manually.
Once you've selected the font, you can use set guifont again which will print out the name of the ...
Is it possible to open a Windows Explorer window from PowerShell?
...tion looking for a way to open an Explorer window from PowerShell and also select a file. I'm adding this answer in case others come across it for the same reason.
To launch Explorer and select a file, use Invoke-Expression:
Invoke-Expression "explorer '/select,$filePath'"
There are probably oth...
How to create and use resources in .NET
...e project you want to add a resource to. Do this in the Solution Explorer. Select the "Properties" option from the list.
Click the "Resources" tab.
The first button along the top of the bar will let you select the type of resource you want to add. It should start on string. We want to add an icon, s...
Should I return a Collection or a Stream?
...seems to have adopted this naming idiom, though not exclusively. Consider: CharSequence.chars() and .codePoints(), BufferedReader.lines(), and Files.lines() existed in Java 8. In Java 9, the following have been added: Process.children(), NetworkInterface.addresses(), Scanner.tokens(), Matcher.result...
Shortest distance between a point and a line segment
...community wiki
5 revs, 3 users 97%char m
1
...