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Delete duplicate rows from small table
...ename) t
WHERE t.rnum > 1);
provided by Postgres wiki:
https://wiki.postgresql.org/wiki/Deleting_duplicates
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force client disconnect from server with socket.io and nodejs
...
Checking this morning it appears it is now:
socket.close()
https://socket.io/docs/client-api/#socket-close
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How to explicitly discard an out argument?
...t int x, out _); // I only care about x
WriteLine($"{x}");
}
Source: https://blogs.msdn.microsoft.com/dotnet/2017/03/09/new-features-in-c-7-0/
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Why is it string.join(list) instead of list.join(string)?
...tring class, instead of the list class?
I agree it looks funny.
See http://www.faqs.org/docs/diveintopython/odbchelper_join.html:
Historical note. When I first learned
Python, I expected join to be a method
of a list, which would take the
delimiter as an argument. Lots of
people feel the same way, ...
Objective-C categories in static library
...ments.
Problem was caused by (citation from apple Technical Q&A QA1490 https://developer.apple.com/library/content/qa/qa1490/_index.html):
Objective-C does not define linker
symbols for each function (or method,
in Objective-C) - instead, linker
symbols are only generated for each
class. If you...
Do subclasses inherit private fields?
...e Java Language Specification (currently 3rd edition).
As the JLS states (https://docs.oracle.com/javase/specs/jls/se8/html/jls-8.html#jls-8.2):
Members of a class that are declared
private are not inherited by
subclasses of that class. Only members
of a class that are declared protecte...
iOS app, programmatically get build version
...("CFBundleVersion") as! String
Its included in this repo, check it out:
https://github.com/goktugyil/EZSwiftExtensions
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What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...zon S3) or Infrastructure-as-a-service on top of it (such as Uploadcare):
https://uploadcare.com/upload-api-cloud-storage-and-cdn/
But storing files in the database is a bad idea.
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How do I set the size of Emacs' window?
...
Taken from: http://www.gnu.org/software/emacs/windows/old/faq4.html
(setq default-frame-alist
'((top . 200) (left . 400)
(width . 80) (height . 40)
(cursor-color . "white")
(cursor-type . box)
(foreground-...
Should I call Close() or Dispose() for stream objects?
... if (count != 0)
{
writer.Write(buffer, 0, count);
}
}
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/proposals/csharp-8.0/using
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