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Number of occurrences of a character in a string [duplicate]
... extensions to make a simpler, and almost as efficient version. There is a bit more overhead, but it's still surprisingly close to the loop in performance:
int cnt = test.Count(c => c == '&');
Then there is the old Replace trick, however that is better suited for languages where looping is...
How to get JS variable to retain value after page refresh? [duplicate]
...resh the page and type window.name; it should respond with foo.
This is a bit of a hack, but if you don't want cookies filled with unnecessary data being sent to the server with every request, and if you can't use localStorage for whatever reason (legacy clients), it may be an option to consider.
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How to leave/exit/deactivate a Python virtualenv
...nt_for_it then $. name_i_want_for_it/bin/activate virtualenv still seems a bit off to me. Needs to be improved...
– uchuugaka
Dec 28 '15 at 8:32
3
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Controlling number of decimal digits in print output in R
...e printing R's usual numbers, since the best accuracy you can get using 64-bit doubles is around 16 decimal digits (look at .Machine$double.eps on your system). The remaining digits will just be junk.
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Insert into a MySQL table or update if exists
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This is a bit late, but anyway: it is stated in the manual that updates in ON DUPLICATE KEY UPDATE increase the affected rows by 2. It reports 0 if nothing is actually updated (same as the regular UPDATE).
– Vatev...
vagrant up failed, /dev/vboxnetctl: no such file or directory
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I'm running macOS High Sierra 10.13.1 and VirtualBox 5.2.2.
This worked for me:
Grant permission to VirtualBox under System Preferences > Security & Privacy > General (this request is new to macOS High Sierra)
Open Terminal and run: sudo "/Libr...
How does the Amazon Recommendation feature work?
...nearest neighbor methods, and neural networks. Here are some papers by the winning team:
R. Bell, Y. Koren, C. Volinsky, "The BellKor 2008 Solution to the Netflix Prize", (2008).
A. Töscher, M. Jahrer, “The BigChaos Solution to the Netflix Prize 2008", (2008).
A. Töscher, M. Jahrer, R. Legens...
XmlSerializer: remove unnecessary xsi and xsd namespaces
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– Dave Van den Eynde
May 19 '09 at 12:10
3
2. This pollutes the classes more. My objective is not t...
Should you always favor xrange() over range()?
...e (and usually much more efficiently). There is a point where range() is a bit faster than xrange() for very small lists, but depending on your hardware and various other details, the break-even can be at a result of length 1 or 2; not something to worry about. Prefer xrange().
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is vs typeof
...optimization.
– Sam Harwell
Feb 22 '10 at 18:39
2
Read higherlogics.blogspot.ca/2013/09/… too -...