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Return Boolean Value on SQL Select Statement
...eed:
SELECT CASE WHEN EXISTS (
SELECT *
FROM [User]
WHERE UserID = 20070022
)
THEN CAST(1 AS BIT)
ELSE CAST(0 AS BIT) END
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JPA OneToMany not deleting child
...
JPA's behaviour is correct (meaning as per the specification): objects aren't deleted simply because you've removed them from a OneToMany collection. There are vendor-specific extensions that do that but native JPA doesn't cater for it.
In part this is...
How Does Modulus Divison Work
...vision is the remainder of an integer division of the given numbers.
That means:
27 / 16 = 1, remainder 11
=> 27 mod 16 = 11
Other examples:
30 / 3 = 10, remainder 0
=> 30 mod 3 = 0
35 / 3 = 11, remainder 2
=> 35 mod 3 = 2
...
How do I check if an HTML element is empty using jQuery?
... Note that $.children() does not return text or comment nodes, which means this solution only checks is the element is empty of elements. If an element that contains only text or comments should not be considered empty for your needs, then you should use one of the other solutions.
...
create multiple tag docker image
...ple tags on your images via the command line.
Use this to list your image ids:
$ docker images
Then tag away:
$ docker tag 9f676bd305a4 ubuntu:13.10
$ docker tag 9f676bd305a4 ubuntu:saucy
$ docker tag eb601b8965b8 ubuntu:raring
...
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What's the difference between Perl's backticks, system, and exec?
... missing from the above is a way to execute a command asynchronously.
That means your perl script and your command run simultaneously.
This can be accomplished with open.
It allows you to read STDOUT/STDERR and write to STDIN of your command.
It is platform dependent though.
There are also several ...
Loading a properties file from Java package
...paths (those without a leading '/') in getResource()/getResourceAsStream() mean that the resource will be searched relative to the directory which represents the package the class is in.
Using java.lang.String.class.getResource("foo.txt") would search for the (inexistent) file /java/lang/String/foo...
How can I trim beginning and ending double quotes from a string?
...
Here is the regex broken down: ^\"|\"$. | means "or". It will thus match either ^\" or \"$. ^ matches start of string and $ matches end of string. ^\" means match a quote at the start of the string and \"$ matches a quote at the end of the string.
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How to loop through array in jQuery?
...no dependency on jQuery, easy to understand, no issues with preserving the meaning of this within the body of the loop, no unnecessary overhead of function calls (e.g., in theory faster, though in fact you'd have to have so many elements that the odds are you'd have other problems; details).
ES5's ...
How to find the size of an array in postgresql
...ing PostgreSQL 9.4 or higher, you can use cardinality:
SELECT cardinality(id) FROM example;
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