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Is there an AddRange equivalent for a HashSet in C#
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Which are more performant, CTE or temporary tables?
...Notice in the plan above there is no mention of CTE1. It just accesses the base tables directly and is treated the same as
SELECT A,
ABS(B) AS Abs_B,
F
FROM T
WHERE A = 780
Rewriting by materializing the CTE into an intermediate temporary table here would be massively counter pr...
Android layout replacing a view with another view on run time
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remove all variables except functions
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Proper use of errors
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Create an empty list in python with certain size
...ect. So unless you simply want 10 copies of the same object, use the range based variant as it creates 10 new objects. I found this distinction very important.
– Mandeep Sandhu
Apr 23 '18 at 18:29
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Suppress warning messages using mysql from within Terminal, but password written in bash script
...allows you to have multiple config files - for different servers/roles/databases. Using ~/.my.cnf will only allow you to have one set of configuration (although it may be a useful set of defaults).
If you're on a Debian based distro, and running as root, you could skip the above and just use /etc/my...
SVG fill color transparency / alpha?
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How to annotate MYSQL autoincrement field with JPA annotations
...nt to give the generator, "myschema" is the name of the schema in your database that contains the sequence object, and "mysequence" is the name of the sequence object in the database.
@GeneratedValue(strategy= GenerationType.SEQUENCE, generator="MySequenceGenerator")
@SequenceGenerator(allocationSi...
Error while installing json gem 'mkmf.rb can't find header files for ruby'
...lation fails.
I would suggest you to install ruby-dev (ruby-devel for rpm-based distros) package onto you target machine.
gcc package might be needed as well.
Try:
$ sudo apt-get install ruby-dev
Or, for Redhat distro:
$ sudo yum install ruby-devel
Or, for [open]SuSE:
$ sudo zypper install...