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Is there a standardized method to swap two variables in Python?
...not say it is a standard way to swap because it will cause some unexpected errors.
nums[i], nums[nums[i] - 1] = nums[nums[i] - 1], nums[i]
nums[i] will be modified first and then affect the second variable nums[nums[i] - 1].
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Calculate size of Object in Java [duplicate]
...NSAFE = (sun.misc.Unsafe) theUnsafe;
if (UNSAFE == null) throw new Error("Could not obtain access to sun.misc.Unsafe", exception);
}
private UtilUnsafe() { }
}
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How do you run a SQL Server query from PowerShell?
... Why is it outputting columns sometimes and not other times? Where are my error messages? Why is it on one computer or not another? How do I install it? The answer to each question is worse than the last.
– Pxtl
Aug 7 '18 at 21:29
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Convert a Scala list to a tuple?
... solution, the complaints about type-safety mean that you might get a MatchError at runtime. If you want, you can try-catch that error and do something if the List has the wrong length. Another nice feature of this solution is that the output doesn't have to be a tuple, it can be one of your own c...
How do you roll back (reset) a Git repository to a particular commit? [duplicate]
...t-id>, ( 2 back ) when doing "git push -f origin master" I get "remote: error: denying non-fast-forward refs/heads/master (you should pull first)" it is my repo and I want to take it back :)
– peterk
Mar 21 '12 at 19:25
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.NET: Simplest way to send POST with data and read response
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What is httpRequest? Its giving me an error "Does not exist".
– Rahul Khandelwal
Dec 22 '16 at 6:10
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How can I start PostgreSQL server on Mac OS X?
...t is the result of pg_ctl -D /usr/local/var/postgres status?
Are there any error messages in the server.log?
Make sure tcp localhost connections are enabled in pg_hba.conf:
# IPv4 local connections:
host all all 127.0.0.1/32 trust
Check the listen_addresses and port in postgresql.conf:
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NuGet behind a proxy
...one using VS2015: I was encountering a "407 Proxy Authentication required" error, which broke my build. After a few hours investigating, it turns out MSBuild wasn't sending credentials when trying to download Nuget as part of the 'DownloadNuGet' target. The solution was to add the following XML to C...
How do I convert a string to a number in PHP?
...cast a string to number by adding a zero, it's usually considered to be an error rather than a valid method of casting :).
– Jan Špaček
Jan 3 '13 at 18:19
4
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How can I extract audio from video with ffmpeg?
...g.exe
Issue your command and wait for the output file (or troubleshoot any errors)
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