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Empty set literal?
...()} # or {*{}} or {*[]}
>>> print(s)
set()
this is basically a more condensed way of doing {_ for _ in ()}, but, don't do this.
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Append a NumPy array to a NumPy array
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numpy.vstack can accept more than 2 arrays in the sequence argument. Thus if you need to combine more than 2 arrays, vstack is more handy.
– ruhong
Oct 22 '15 at 12:57
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Jar Mismatch Found 2 versions of android-support-v4.jar in the dependency list
...oblem, but it seemed to come completely out of the blue, as several other (more difficult) Eclipse/Android problems have. This answer fixes the effect but apparently not the cause.
– Joe Lapp
Nov 4 '14 at 16:56
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MySQL check if a table exists without throwing an exception
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There is no more support for mysql_* functions, they are officially deprecated, no longer maintained and will be removed in the future. You should update your code with PDO or MySQLi to ensure the functionality of your project in the fut...
heroku - how to see all the logs
...il the logs live
heroku logs -t
Heroku log documentation
If you need more than a few thousand lines you can Use heroku's Syslog Drains
Alternatively (old method):
$ heroku run rails c
File.open('log/production.log', 'r').each_line { |line| puts line }
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Two inline-block, width 50% elements wrap to second line [duplicate]
... to eradicate from dynamic situations without a post-processor which costs more CPU-time for marginal bandwidth savings.
– Phil Ricketts
Jul 24 '12 at 17:35
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unix - head AND tail of file
...first 10 lines of its input, there is no guaranteed that it didn't consume more of it in order to find the 10th line ending, leaving less of the input for less to display.
– chepner
Feb 12 '16 at 16:58
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OSX - How to auto Close Terminal window after the “exit” command executed.
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You can use the link for more and step wise step info cnet.com/news/terminal-tip-close-windows-after-clean-exit
– Krishan Kumar Mourya
Jan 12 '18 at 7:37
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Convert two lists into a dictionary
...eated. I would expect all of them to be less performant, and certainly not more-so.
Performance review:
In 64 bit Python 3.8.2 provided by Nix, on Ubuntu 16.04, ordered from fastest to slowest:
>>> min(timeit.repeat(lambda: dict(zip(keys, values))))
0.6695233230129816
>>> min(ti...
How can I pad a String in Java?
...really makes no difference which lib to use. That said, Guava is overall a more modern, cleaner and better documented lib than its counterparts in various Apache Commons projects (Commons Lang, Commons Collections, Commons IO, etc). It's also built by really smart guys (Kevin Bourrillion et al), man...