大约有 23,000 项符合查询结果（耗时：0.0430秒） [XML]
What are the main performance differences between varchar and nvarchar SQL Server data types?
I'm working on a database for a small web app at my school using SQL Server 2005 .
I see a couple of schools of thought on the issue of varchar vs nvarchar :
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Why covariance and contravariance do not support value type
...is in fact a subtype of object (an alias of System.Object). In fact, int's base class is System.ValueType who's base class is System.Object. Try evaluating the following expression and see: typeof(int).BaseType.BaseType. The reason ReferenceEquals returns false here is that the int is boxed into two...
Are HTML Image Maps still used?
...ratio, and then using javascript to overwrite the coordinates. The jquery based image size event handler is $(window).resize(function() { ....yourcode... });
– skidadon
Aug 11 '15 at 3:44
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How to loop through a directory recursively to delete files with certain extensions
...ur filenames, then that won't work either. You're better off with an xargs based solution:
find /tmp \( -name '*.pdf' -or -name '*.doc' \) -print0 | xargs -0 rm
(The escaped brackets are required here to have the -print0 apply to both or clauses.)
GNU and *BSD find also has a -delete action, whi...
Are fluid websites worth making anymore? [closed]
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Text based apps: No. Table based apps: Yes.
Pros of fluid layouts
People with big monitors gets to use their screen real estate.
Easier for users with big monitors when you have a lot of information on your page.
Cons of flui...
Streaming video from Android camera to server
...ting/figuring out), but so far I can only get it to connect from a Windows based browser (Chrome) with the vlc plugin. VLC on Android/iPad or any other rtsp player won't pick up the stream (one of them looked good, but was trying to get a stream based on the device name, which this code returned as ...
Is GET data also encrypted in HTTPS?
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The domain is not encrypted. This is to support name based virtual hosts (vs. IP based). @MarceloCantos is completely correct that the rest of the URL (i.e. the GET command) is encrypted. This is covered in RFC 4366
– hafichuk
Jul 11 '14 a...
Looking for jQuery find(..) method that includes the current node
...ve now is equivalent to .andSelf(). Lastly, the .andFind() doesn't filter based on the expression, you would need to .add($(this).filter(expr)) :)
– Nick Craver♦
May 13 '10 at 16:42
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When should I use genetic algorithms as opposed to neural networks? [closed]
...d by changing a number of weights between them, attempt to predict outputs based on inputs.
They are two fundamentally different entities, but sometimes the problems they are capable of solving overlap.
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MySQL OPTIMIZE all tables?
...mmon stored procedure) to run this optimization for every table in the database and/or server install, or is this something you'd have to script up yourself?
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