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Subset of rows containing NA (missing) values in a chosen column of a data frame

... answered Nov 2 '11 at 13:02 Joris MeysJoris Meys 95k2626 gold badges196196 silver badges254254 bronze badges ...
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What's the difference between EscapeUriString and EscapeDataString?

... 112 Use EscapeDataString always (for more info about why, see Livven's answer below) Edit: remove...
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How does type Dynamic work and how to use it?

...me -> value } } scala> val d = new DynImpl d: DynImpl = DynImpl@7711a38f scala> d.foo java.lang.RuntimeException: method not found scala> d.foo = 10 d.foo: Any = 10 scala> d.foo res56: Any = 10 The code works as expected - it is possible to add methods at runtime to the code. ...
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On a CSS hover event, can I change another div's styling? [duplicate]

... Community♦ 111 silver badge answered Aug 2 '11 at 9:45 thirtydotthirtydot 204k4141 gold b...
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Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into

... Your question was entirely prescient, @Sam. When you asked it in 2011, Steve Souders had long established that round-trips to the server should be eliminated wherever possible. But for years afterwards, the favicon defiantly demanded its own dedicated round-trip. Thankfully that's no longer ...
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What is NODE_ENV and how to use it in Express?

... Pang 8,1981717 gold badges7373 silver badges111111 bronze badges answered Jun 7 '13 at 8:27 Ed HinchliffeEd Hinchliffe 16....
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Match multiline text using regular expression

... Alan MooreAlan Moore 66.5k1111 gold badges8787 silver badges145145 bronze badges ...
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How to implement a queue with three stacks?

... | edited Apr 10 '11 at 17:17 community wiki ...
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Support for “border-radius” in IE

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Can I unshelve to a different branch in tfs 2008?

... answered Mar 25 '11 at 5:22 Simon_WeaverSimon_Weaver 113k7272 gold badges545545 silver badges596596 bronze badges ...