大约有 47,000 项符合查询结果(耗时:0.0750秒) [XML]

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

...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 at all or the vertical line is drawn at the very first vertical grid and the whole series is shifted somewhat strange...
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How can I measure the speed of code written in PHP? [closed]

... 10 Answers 10 Active ...
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How can I round to whole numbers in JavaScript?

...| edited Aug 6 '11 at 16:10 Jeremy 21k44 gold badges6161 silver badges7777 bronze badges answered Aug 6 ...
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How can I check whether a numpy array is empty or not?

...e a look at the .size attribute. It is defined as an integer, and is zero (0) when there are no elements in the array: import numpy as np a = np.array([]) if a.size == 0: # Do something when `a` is empty share ...
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Following git-flow how should you handle a hotfix of an earlier release?

...e. This thread has more information, with these examples: git checkout 6.0 git checkout -b support/6.x git checkout -b hotfix/6.0.1 ... make your fix, then: git checkout support/6.x git merge hotfix/6.0.1 git branch -d hotfix/6.0.1 git tag 6.0.1 or using git flow commands git flow support st...
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Grep regex NOT containing string

... answered May 2 '12 at 10:10 beerbajaybeerbajay 16.2k44 gold badges4848 silver badges7070 bronze badges ...
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How do I use the conditional operator (? :) in Ruby?

...form for readability on multiple lines: question = if question.size > 20 then question.slice(0, 20) + "..." else question end share | improve this answer | follow ...
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Install go with brew, and running the gotour

... Custodio 7,1901212 gold badges7272 silver badges109109 bronze badges answered Dec 30 '14 at 17:36 user2562923user2...
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Should I return EXIT_SUCCESS or 0 from main()?

...eing conflicting answers: should the main routine of a C++ program return 0 or EXIT_SUCCESS ? 8 Answers ...
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Why can't I center with margin: 0 auto?

I have a #header div that is 100% width and within that div I have an unordered list. I have applied margin: 0 auto to the unordered list but it won't center it within the header div. ...