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Why are these numbers not equal?
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General (language agnostic) reason
Since not all numbers can be represented exactly in IEEE f...
Rspec: “array.should == another_array” but without concern for order
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answered Jun 5 '10 at 3:08
x1a4x1a4
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Why is it slower to iterate over a small string than a small list?
...n a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
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Grouping functions (tapply, by, aggregate) and the *apply family
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+100
R has ...
How can I get nth element from a list?
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Look here, the operator used is !!.
I.e. [1,2,3]!!1 gives you 2, since lists are 0-indexed.
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Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
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As Sven mentioned, x[[[0],[2]],[1,3]] will give back the 0 and 2 rows that match with the 1 and 3 columns while x[[0,2],[1,3]] will return the values x[0,1] and x[2,3] in an array.
There is a helpful function for doing the first example I gave, numpy.ix_. Y...
Scala how can I count the number of occurrences in a list
I want to implement it like this: list.count(2) (returns 3).
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Selecting data frame rows based on partial string match in a column
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3 Answers
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Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
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There's a dynamic programming solution. We start off knowing 0 keys can make us 0 A's. Then we i...
Difference between Eclipse Europa, Helios, Galileo
...June 2014 4.4 Luna Projects
Kepler 26 June 2013 4.3 Kepler Projects
Juno 27 June 2012 4.2 Juno Projects
Indigo 22 June 2011 3.7 Indigo projects
Helios 23 June 2010 3.6 ...