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How do I select elements of an array given condition?
Suppose I have a numpy array x = [5, 2, 3, 1, 4, 5] , y = ['f', 'o', 'o', 'b', 'a', 'r'] . I want to select the elements in y corresponding to elements in x that are greater than 1 and less than 5.
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Is SQL or even TSQL Turing Complete?
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223
It turns out that SQL can be Turing Complete even without a true 'scripting' extension such as P...
Why were pandas merges in python faster than data.table merges in R in 2012?
... coerce character to
factor. Factors are still supported. Implements FR#1493, FR#1224
and (partially) FR#951.
New functions chmatch() and %chin%, faster versions of match()
and %in% for character vectors. R's internal string cache is
utilised (no hash table is built). They are about 4 times faster
t...
How to replace captured groups only?
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383
A solution is to add captures for the preceding and following text:
str.replace(/(.*name="\w+...
why unaligned apk is needed?
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edited May 29 '15 at 19:36
Beau Grantham
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answe...
Is there a way to measure how sorted a list is?
...ple sequence 9, 5, 7, 6. This sequence has the inversions (0,1), (0,2), (0,3), (2,3) and the inversion number 4.
If you want a value between 0 and 1, you can divide the inversion number by N choose 2.
To actually create an algorithm to compute this score for how sorted a list is, you have two approa...
What is AssemblyInfo.cs used for?
...msdn.microsoft.com/Forums/en/csharpgeneral/thread/8955449f-71ac-448e-9ee6-5329fceecd3c
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Is it possible to do start iterating from an element other than the first using foreach?
... Collection<string>;
foreach (string curString in myCollection.Skip(3))
//Dostuff
Skip is an IEnumerable function that skips however many you specify starting at the current index. On the other hand, if you wanted to use only the first three you would use .Take:
foreach (string curStri...
How to read the RGB value of a given pixel in Python?
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