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Drop data frame columns by name

... Nutty. identical(post_time_1, post_time_2) [1] TRUE =D – Daniel Fletcher Apr 30 '16 at 2:47 add a comment ...
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Which is best way to define constants in android, either static class, interface or xml resource?

...ER = "http://192.168.100.2/bs.dev/nrum"; public static final String API_END = SERVER + "/dataProvider"; public static final String NEWS_API = API_END + "/newsApi"; public static final String BANNER_API = API_END + "/bannerApi/lists"; public static final String NOTICE_API = API_END + ...
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How to know what the 'errno' means?

...errno)); } Linux also supports the explicitly-threadsafe variant strerror_r(). share | improve this answer | follow | ...
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When creating a service with sc.exe how to pass in context parameters?

...my repositories". So in summary space after each sc parameter: binpath=_, displayname=_ and depend=_ each sc parameter that contains spaces must be enclosed in quotes all additional quotes inside the binpath are escaped with backslashes: \" all backslashes inside the binpath are not escaped ...
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How does the SQL injection from the “Bobby Tables” XKCD comic work?

... you can only run multiple statements in one SQL string by using the mysqli_multi_query function. You can, however, manipulate an existing SQL statement via SQL injection without having to add a second statement. Let's say you have a login system which checks a username and a password with this sim...
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Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]

... exactly the same set of properties and values. As a result, instead of #LI_1{...}, #LI_2{...} I got #LI_1, #LI_2 {...}. Problem 6 - cleaning up and fixing indentation of HTML Since I was happy with the result, I moved to HTML. It looked like a mess, mostly because the outerHTML property keeps it ...
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Can someone explain the traverse function in Haskell?

...an also compare it to Foldable, which defines the related function traverse_. traverse_ :: (Foldable t, Applicative f) => (a -> f b) -> t a -> f () So you can see that the key difference between Foldable and Traversable is that the latter allows you to preserve the shape of the struct...
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How to create standard Borderless buttons (like in the design guideline mentioned)?

...ike in the right picture above). <RelativeLayout android:layout_width="match_parent" android:layout_height="48dp" android:layout_alignParentBottom="true"> <View android:layout_width="match_parent" android:layout_height="1dip" ...
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Sequelize.js: how to use migrations and sync

...: sequelize init ... sequelize model:create --name User --attributes first_name:string,last_name:string,bio:text This will create both model AND migration. Then, manually merge your existing models with generated with sequelize-cli, and do the same with migrations. After doing this, wipe database...
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Reintegrate can only be used if revisions X through Y were previously merged from to reintegra

...: $ svn merge --reintegrate https://server.blah/source/orb/branches/bronze_services svn: Reintegrate can only be used if revisions 650 through 694 were previously merged from https://server.blah/source/orb/trunk to the reintegrate source, but this is not the case: branches/bronze_servic...