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Ruby: extend self

... 115 It is a convenient way to make instance methods into class methods. But you can also use it as...
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ggplot2 keep unused levels barplot

... David Arenburg 85.3k1414 gold badges119119 silver badges174174 bronze badges answered Apr 3 '14 at 7:52 UlrikUlrik ...
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Combining INSERT INTO and WITH/CTE

... | edited May 24 '12 at 11:38 answered Jul 22 '10 at 5:54 ...
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Specify multiple attribute selectors in CSS

... raina77owraina77ow 86.7k1010 gold badges171171 silver badges201201 bronze badges 8 ...
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How to loop through a HashMap in JSP?

... Community♦ 111 silver badge answered Dec 2 '09 at 20:55 BalusCBalusC 953k341341 gold badg...
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How can I do DNS lookups in Python, including referring to /etc/hosts?

... 118 I'm not really sure if you want to do DNS lookups yourself or if you just want a host's ip. In...
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Count with IF condition in MySQL query

... 11 Or even SUM(ccc_news_comments.id = 'approved') as a MySQL-specific trick – mojuba Jan 21 '13 at 20:4...
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How is performance affected by an unused using directive?

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ASP.NET web.config: configSource vs. file attributes

...7 DdW 70711 gold badge1616 silver badges2727 bronze badges answered Aug 4 '11 at 10:51 Massimiliano PelusoMass...
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Do you need to close meta and link tags in HTML?

... answered Oct 22 '13 at 6:11 Jukka K. KorpelaJukka K. Korpela 171k3030 gold badges223223 silver badges332332 bronze badges ...