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Shell equality operators (=, ==, -eq)
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It depends on the Test Construct around the operator. Your options are double parenthesis, double braces, single braces, or test
If you use ((...)), you are testing arithmetic equity with == as in C:
$ (( 1==1 )); echo $?
0
$ (( 1==2 )); ec...
Scala: List[Future] to Future[List] disregarding failed futures
...version of Scala (2.11.5)... I corrected that, and wrote a few additional tests if anyone is interested... here is my version >
implicit class FutureCompanionOps(val f: Future.type) extends AnyVal {
/** Given a list of futures `fs`, returns the future holding the list of Try's of the fut...
Test if a variable is set in bash when using “set -o nounset”
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echo 'empty but defined'
else
echo 'unset'
fi
}
Test:
$ unset WHATEVER
$ check
unset
$ WHATEVER=
$ check
empty but defined
$ WHATEVER=' '
$ check
not empty
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Export/import jobs in Jenkins
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Confirmed, you need to reload Jenkins after applying what the document says.
– Miguel Ortiz
May 31 '19 at 20:19
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String concatenation in MySQL
...e CONCAT function:
SELECT CONCAT(first_name, " ", last_name) AS Name FROM test.student
As @eggyal pointed out in comments, you can enable string concatenation with the || operator in MySQL by setting the PIPES_AS_CONCAT SQL mode.
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How to remove “Server name” items from history of SQL Server Management Studio
...Seriously? Why didn't I try that first? Haha. For anyone interested, I can confirm this works in SSMS 2014.
– Jargs
Nov 15 '14 at 5:08
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libxml/tree.h no such file or directory
...mlink to it in /usr/include. I haven't tried installing libxml2 so I can't confirm default behavior. But yes, it's much better to link it that way.
– Matt Ball
Sep 16 '09 at 13:59
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Best way to detect Mac OS X or Windows computers with JavaScript or jQuery
...r.platform property is not spoofed when the userAgent string is changed.
I tested on my Mac if I change the userAgent to iPhone or Chrome Windows, navigator.platform remains MacIntel.
The property is also read-only
I could came up with the following table
Mac Computers
Mac68K ...
What’s the difference between ScalaTest and Scala Specs unit test frameworks?
Both are BDD (Behavior Driven Development) capable unit test frameworks for Scala written in Scala. And Specs is built upon may also involve the ScalaTest framework. But what does Specs offer ScalaTest doesn't? What are the differences?
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Best data type to store money values in MySQL
... places for certain obscure accounting contexts. Wd need an accountant to confirm/refute.
– mike rodent
Aug 3 '17 at 19:43
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