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Pandas selecting by label sometimes return Series, sometimes returns DataFrame
...ntry in the index I get back a Series, but when I select an entry that has more then one entry I get back a data frame.
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How can the Euclidean distance be calculated with NumPy?
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there are even more faster methods than numpy.linalg.norm: semantive.com/blog/…
– Muhammad Ashfaq
Apr 26 at 12:22
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Difference between malloc and calloc?
... doesn't need to write them in user-space. This is how normal malloc gets more pages from the OS as well; calloc just takes advantage of the OS's guarantee.
This means calloc memory can still be "clean" and lazily-allocated, and copy-on-write mapped to a system-wide shared physical page of zeros. ...
List all files and directories in a directory + subdirectories
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Remove HTML Tags in Javascript with Regex
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Access parent URL from iframe
...ll possible to get the URL depending on the context. See other answers for more details.
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When to throw an exception?
...r function which examines a List<> and returns true if its length is more than 50, and false if the length is less. This function asks the question, "Does this list have more than 50 items?" But this question makes an assumption - it assumes that the object it is given is a list. If I hand it ...
Print “hello world” every X seconds
...rrect :\ The age of the two APIs aside, ScheduledExecutorService is simply more intuitively declarative. The use of TimeUnit as a parameter makes it much more clear what is occurring. Gone are the days of code like 5*60*1000 // 5 minutes.
– Tim Bender
Feb 14 '1...
What good are SQL Server schemas?
...naming conventions? I'm not suggesting there NOT a use case for it; it is, more often than not, an addition by subtraction.
– sam yi
Aug 15 '14 at 14:59
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