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Selecting multiple columns in a pandas dataframe
...n interface to NumPy's usual __getitem__ syntax. That said, you can easily convert a column-slicing problem into a row-slicing problem by just applying a transpose operation, df.T. Your example uses columns[1:3], which is a little misleading. The result of columns is a Series; be careful not to just...
What is the purpose of the “final” keyword in C++11 for functions?
...hat is the purpose of the final keyword in C++11 for functions? I understand it prevents function overriding by derived classes, but if this is the case, then isn't it enough to declare as non-virtual your final functions? Is there another thing I'm missing here?
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How do I break out of a loop in Scala?
...> sum+=i)
(warning--this depends on details of how the takeWhile test and the foreach are interleaved during evaluation, and probably shouldn't be used in practice!).
(1b) Use tail recursion instead of a for loop, taking advantage of how easy it is to write a new method in Scala:
var sum = 0
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How to set up Spark on Windows?
...s guide: http://spark.apache.org/docs/latest/building-spark.html
Download and install Maven, and set MAVEN_OPTS to the value specified in the guide.
But if you're just playing around with Spark, and don't actually need it to run on Windows for any other reason that your own machine is running Wind...
What is the difference between memmove and memcpy?
What is the difference between memmove and memcpy ? Which one do you usually use and how?
9 Answers
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Type definition in object literal in TypeScript
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not working. Error:(33, 15) TS2352:Type 'null' cannot be converted to type 'string'.
– slideshowp2
Jun 27 '17 at 6:53
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How to add a button to PreferenceScreen
Is there any way to add a button to the bottom of preferences screen and make them work correct when scrolling?
12 Answers
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Returning value that was passed into a method
... me: The string in .Returns<string> refers to the input parameter(s) and not the values you are returning.
– Jim
Jul 31 '15 at 15:13
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equals vs Arrays.equals in Java
...ntents of the arrays.
Similarly array.toString() may not be very useful and you need to use Arrays.toString(array).
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How to design RESTful search/filtering? [closed]
...uage, this might still be a good convention and you can create a parser to convert [] to an array.
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