大约有 43,000 项符合查询结果(耗时:0.0502秒) [XML]

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How to configure Mac OS X term so that git has color? [closed]

...eferences) or by pressing Command+,. Once the preferences dialogue opens, select the terminal style from the pane on the left, select Text from the button bar, than make sure the "Display ANSI colors" check box is checked. That will enable the colors on the terminal. To get colors in the output o...
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Error: “The sandbox is not in sync with the Podfile.lock…” after installing RestKit with cocoapods

...hat by updating CocoaPods. I. Project Cleanup In the project navigator, select your project Select your target Remove all libPods*.a in Build Phases > Link Binary With Libraries II. Update CocoaPods Launch Terminal and go to your project directory. Update CocoaPods using the command pod in...
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How to reshape data from long to wide format

...mes(df) <- unique(dat1$name) df sqldf package: library(sqldf) sqldf('SELECT name, MAX(CASE WHEN numbers = 1 THEN value ELSE NULL END) x1, MAX(CASE WHEN numbers = 2 THEN value ELSE NULL END) x2, MAX(CASE WHEN numbers = 3 THEN value ELSE NULL END) x3, MAX(CASE WHEN numbe...
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Pass a data.frame column name to a function

...(x[,column]) } fun1(df, "B", max) Alternatively, using [[ also works for selecting a single column at a time: df <- data.frame(A=1:10, B=2:11, C=3:12) fun1 <- function(x, column){ max(x[[column]]) } fun1(df, "B") ...
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Unable to cast object of type 'System.DBNull' to type 'System.String`

... even both. If the WHERE does not match any row, you'll get a null, if the selected row has NULL in that column, the return value is System.DBNull. – Alexander May 27 '14 at 7:52 ...
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Closing Database Connections in Java

...ent statement = connection.createStatement()) { String sqlToExecute = "SELECT * FROM persons"; try (ResultSet resultSet = statement.execute(sqlToExecute)) { if (resultSet.next()) { System.out.println(resultSet.getString("name"); } } } catch (SQLException e) { ...
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Error message 'Unable to load one or more of the requested types. Retrieve the LoaderExceptions prop

...an also happen if your referenced DLL is "blocked". Right click on it, and select "unblock" – Ben Jun 10 '10 at 10:05 4 ...
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How should I cast in VB.NET?

... Dim myList AS ArrayList=new ArrayList When you write (From e In myList select CType(e.Name,String)).ToArray() it doesn't work. I came to write ... select CType(e.Name.ToString,String)).ToArray() and I retrieved my smile. – Bellash Mar 25 '14 at 21:13 ...
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Web Application Problems (web.config errors) HTTP 500.19 with IIS7.5 and ASP.NET v2

...ou can use the Microsoft Web Platform Installer to install it. Execute it, select Products, in the left menu select Server and find URL Rewrite in the list and install it. Or you can download it here. share | ...
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can we use xpath with BeautifulSoup?

...tree.HTMLParser() tree = etree.parse(response, htmlparser) tree.xpath(xpathselector) There is also a dedicated lxml.html() module with additional functionality. Note that in the above example I passed the response object directly to lxml, as having the parser read directly from the stream is more...