大约有 20,159 项符合查询结果(耗时:0.0197秒) [XML]

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How to get a vertical geom_vline to an x-axis of class date?

Even though I found Hadley's post in the google group on POSIXct and geom_vline , I could not get it done. I have a time series from and would like to draw a vertical line for years 1998, 2005 and 2010 for example. I tried with ggplot and qplot syntax, but still I either see no vertical line ...
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How do I change the highlight style in Vim spellcheck?

Right now, when I do :set spell in my Vim, I get spelling errors highlighted as if they are selected text. What I want is an MS-Word like underlining of spelling errors. I tried to lookup :help spell but could not find a clue. Any help is appreciated. ...
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What kind of virtual machine is BEAM (the Erlang VM)?

From what I understand a virtual machine falls into two categories either "system virtual machine" or a "process virtual machine". It's kind of fuzzy to me where BEAM lies. Is there another kind of virtual machine I am not aware of? ...
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Use RSA private key to generate public key?

I don't really understand this one: 9 Answers 9 ...
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fancybox - d.onCleanup is not a function

this is driving me nuts. Iv'e created a simple test page.. 1 Answer 1 ...
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How do I change column default value in PostgreSQL?

How do I change column default value in PostgreSQL? 2 Answers 2 ...
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Scala: join an iterable of strings

How do I "join" an iterable of strings by another string in Scala? 1 Answer 1 ...
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Can I add comments to a pip requirements file?

I'd like to add comments for a few packages in a pip requirements file. (Just to explain why that package is on the list.) Can I do this? ...
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Precedence and bitmask operations

I've come across a (seemingly) very strange case. 1 Answer 1 ...
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How do you append to an already existing string?

I want append to a string so that every time I loop over it will add say "test" to the string. 7 Answers ...