大约有 40,000 项符合查询结果(耗时:0.0656秒) [XML]

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How to convert a char to a String?

I have a char and I need a String . How do I convert from one to the other? 12 Answers ...
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Int or Number DataType for DataAnnotation validation attribute

On my MVC3 project, I store score prediction for football/soccer/hockey/... sport game. So one of properties of my prediction class looks like this: ...
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postgres: upgrade a user to be a superuser?

In postgres, how do I change an existing user to be a superuser? I don't want to delete the existing user, for various reasons. ...
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Grouping functions (tapply, by, aggregate) and the *apply family

Whenever I want to do something "map"py in R, I usually try to use a function in the apply family. 10 Answers ...
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SSL Error When installing rubygems, Unable to pull data from 'https://rubygems.org/

I am trying to do the Michael Hartl tutorial. When I attempt to install rails 3.2.14 in my gemset, I get the following issue: ...
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List of all index & index columns in SQL Server DB

How do I get a list of all index & index columns in SQL Server 2005+? The closest I could get is: 30 Answers ...
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Extract traceback info from an exception object

Given an Exception object (of unknown origin) is there way to obtain its traceback? I have code like this: 5 Answers ...
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Does PNG contain EXIF data like JPG?

I was wondering if PNG contains data like the following? 6 Answers 6 ...
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Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...

Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞int send( SOCKET s, const char FAR *buf, int len, int flags ); 不论是客户还是服务器应用程序都用send函数来向TCP连接的...int send( SOCKET s, const char FAR *buf, int len, int flags ); ...
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Best practice for nested fragments in Android 4.0, 4.1 (

I'm writing an app for 4.0 and 4.1 tablets, for which I do not want to use the support libraries (if not needed) but the 4.x api only therefore. ...