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@property retain, assign, copy, nonatomic in Objective-C
... solutions. In fact nonatomic is generally the better choice as it omits extremely expensive thread locks. The only reason to use atomic is if your property might be set from multiple threads (in which case omitting it can lead to an over-release or a leak).
– Adam Kaplan
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Difference between timestamps with/without time zone in PostgreSQL
...e.
Whether the value is specified with a particular time zone.
Here are examples covering the combinations of those factors:
foo=> SET TIMEZONE TO 'Japan';
SET
foo=> SELECT '2011-01-01 00:00:00'::TIMESTAMP;
timestamp
---------------------
2011-01-01 00:00:00
(1 row)
foo=> S...
How to configure multi-module Maven + Sonar + JaCoCo to give merged coverage report?
...hat many people had the same issue, but no one could be bothered to fully explain how they solved it.
The Sonar docs refer to a GitHub project with examples that are helpful. What I did to solve this was to apply the integration tests logic to regular unit tests (although proper unit tests should...
multi-layer perceptron (MLP) architecture: criteria for choosing number of hidden layers and size of
...t linearly separable, it doesn't hurt to verify this--why use a more complex model than the task requires? If it is linearly separable then a simpler technique will work, but a Perceptron will do the job as well.
Assuming your data does require separation by a non-linear technique, then always star...
What characters are allowed in an email address?
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See RFC 5322: Internet Message Format and, to a lesser extent, RFC 5321: Simple Mail Transfer Protocol.
RFC 822 also covers email addresses, but it deals mostly with its structure:
addr-spec = local-part "@" domain ; global address
local-part = word *("." word...
commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated
...when using <h:commandLink> , <h:commandButton> or <f:ajax> , the action , actionListener or listener method associated with the tag are simply not being invoked. Or, the bean properties are not updated with submitted UIInput values.
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What are the benefits of dependency injection containers?
...pers of different kinds, etc. I'm just wondering, what are the benefits of XML configuration such as:
16 Answers
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Passing Parameters JavaFX FXML
How can I pass parameters to a secondary window in javafx? Is there a way to communicate with the corresponding controller?
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
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I created a test suite, precisely to explore these issues (and more) (archived copy).
And in that sense, you can see the performance issues in this 50+ test case tester (it will take a long time).
Also as its name suggest, it explores the usage of using the nat...
Algorithm for creating a school timetable
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This problem is NP-Complete!
In a nutshell one needs to explore all possible combinations to find the list of acceptable solutions. Because of the variations in the circumstances in which the problem appears at various schools (for example: Are there constraints with regards to c...