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count(*) vs count(column-name) - which is more correct? [duplicate]
...s a non-null expressions
Your use of COUNT(*) or COUNT(column) should be based on the desired output only.
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Is there a properly tested alternative to Select2 or Chosen? [closed]
... possible alternative is bootstrap-multiselect
"JQuery multiselect plugin based on Twitter Bootstrap"
Examples and documentation: http://davidstutz.github.io/bootstrap-multiselect/
The repository does not contain any automated tests, manual tests instead
Themed using Bootstrap 3
JavaScript sourc...
List of Delphi language features and version in which they were introduced/deprecated
...form (but without additional text for deprecated)
Variant is no longer based on COM but changed to be CLX compatible, COM based variant renamed to OLEVariant
Typed constants cannot be assigned to (Override with {$J+})
Enumerated types can be assigned an explicit value (cf C++);
Interface pr...
How do I select an element with its name attribute in jQuery? [duplicate]
...+ '"]',
document.getElementById('searcharea')); // with a search base
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How can I prevent SQL injection in PHP?
...d queries. These are SQL statements that are sent to and parsed by the database server separately from any parameters. This way it is impossible for an attacker to inject malicious SQL.
You basically have two options to achieve this:
Using PDO (for any supported database driver):
$stmt = $pdo-&g...
How to go back (ctrl+z) in vi/vim
...esent, but the value added of my answer is redo as Ctrl + r (lower case r) based on the documentation. Nobody before put it here. In addition, I tried to make the answer as clearly as possible.
– simhumileco
Mar 22 '19 at 2:36
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Remove plot axis values
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Using base graphics, the standard way to do this is to use axes=FALSE, then create your own axes using Axis (or axis). For example,
x <- 1:20
y <- runif(20)
plot(x, y, axes=FALSE, frame.plot=TRUE)
Axis(side=1, labels=FALSE)...
Multiprocessing - Pipe vs Queue
...ow you to increase the size of a file, but the maximum size allowed varies based on system configurations. You should therefore never rely on Pipe() to buffer data. Calls to connection.send could block until data gets read from the pipe somehwere else.
In conclusion, Queue is a better choice than ...
How can I select the first day of a month in SQL?
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In addition to all the above answer, a way based on a function introduced in sql 2012
SELECT DATEFROMPARTS(YEAR(@mydate),MONTH(@mydate),1)
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Different types of thread-safe Sets in Java
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On ConcurrentHashMap based set, "thus try to avoid this by estimating the needed size on creation." The size you give to the map should be over 33% larger than your estimate (or known value), since the set resizes at 75% load. I use expectedSize ...