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Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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How do I translate an ISO 8601 datetime string into a Python datetime object? [duplicate]
I'm getting a datetime string in a format like "2009-05-28T16:15:00" (this is ISO 8601, I believe). One hackish option seems to be to parse the string using time.strptime and passing the first six elements of the tuple into the datetime constructor, like:
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Using i and j as variables in Matlab
...enoting the imaginary unit:
http://www.mathworks.co.uk/help/matlab/ref/i.html
http://www.mathworks.co.uk/help/matlab/ref/j.html
So a variable called i or j will override them, potentially silently breaking code that does complex maths.
Possible solutions include using ii and jj as loop variable...
What are the differences between “=” and “
...assignment operators.
http://stat.ethz.ch/R-manual/R-patched/library/base/html/assignOps.html
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Get first day of week in PHP?
Given a date MM-dd-yyyy format, can someone help me get the first day of the week?
38 Answers
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How to Customize the time format for Python logging?
I am new to Python's logging package and plan to use it for my project. I would like to customize the time format to my taste. Here is a short code I copied from a tutorial:
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How do I get current date/time on the Windows command line in a suitable format for usage in a file/
...: Now that it's 2016 I'd use PowerShell for this unless there's a really compelling backwards-compatible reason for it, particularly because of the regional settings issue with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479
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How can I obfuscate (protect) JavaScript? [closed]
...iolators". Can someone really be violating a license that is buried in the HTML/JavaScript files if he never signed anything? +1 for the AJAX calls.
– Alerty
Oct 30 '11 at 17:14
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Weighted random numbers
I'm trying to implement a weighted random numbers. I'm currently just banging my head against the wall and cannot figure this out.
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node and Error: EMFILE, too many open files
...evlog/2014/1/11/how-to-determine-whats-causing-error-connect-emfile-nodejs.html
How To Isolate
This command will output the number of open handles for nodejs processes:
lsof -i -n -P | grep nodejs
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
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nodejs 12211 root 1012u IP...