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Persistent invalid graphics state error when using ggplot2

... I ran into this same error and solved it by running: dev.off() and then running the plot again. I think the graphics device was messed up earlier somehow by exporting some graphics and it didn't get reset. This worked for me and it's simpler tha...
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What does MVW stand for?

Here's the content description for AngularJS page: 5 Answers 5 ...
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How should I copy Strings in Java?

At this point, the backup variable still contains the original value "hello" (this is because of String's immutability right?). ...
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How to get StackPanel's children to fill maximum space downward?

...l element uses up all the remaining space. But why not use a DockPanel? Decorate the other elements in the DockPanel with DockPanel.Dock="Top", and then your help control can fill the remaining space. XAML: <DockPanel Width="200" Height="200" Background="PowderBlue"> <TextBlock DockPa...
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Using Moq to mock an asynchronous method for a unit test

I am testing a method for a service that makes a Web API call. Using a normal HttpClient works fine for unit tests if I also run the web service (located in another project in the solution) locally. ...
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Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate]

I just came across a weird error: 9 Answers 9 ...
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gcc warning" 'will be initialized after'

...rd party code that I cannot modify. Is there a way to disable this warning or at least disable it for certain areas (like #pragma push/pop in VC++)? ...
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How to get a list of repositories apt-get is checking? [closed]

... @Iony Howbout this : apt-cache policy | awk '/http.*amd64/{print$2}' | sort -u – SebMa Sep 2 at 18:09 add a comment  |  ...
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Haskell composition (.) vs F#'s pipe forward operator (|>)

In F#, use of the the pipe-forward operator, |> , is pretty common. However, in Haskell I've only ever seen function composition, (.) , being used. I understand that they are related , but is there a language reason that pipe-forward isn't used in Haskell or is it something else? ...
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SQLite Reset Primary Key Field

...TE_SEQUENCE table is created and initialized automatically whenever a normal table that contains an AUTOINCREMENT column is created. The content of the SQLITE_SEQUENCE table can be modified using ordinary UPDATE, INSERT, and DELETE statements. But making modifications to this table w...