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What is the difference between the template method and the strategy patterns?
...atum); }
}
In summary:
Template method pattern: compile-time algorithm selection by subclassing
Strategy pattern: run-time algorithm selection by containment
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How to sign an android apk file
...or Signing.
To create a signed and aligned .apk in
Eclipse:
Select the project in the Package Explorer and select File >
Export.
Open the Android folder, select Export Android Application, and click
Next.
The Export Android Application wizard now starts, which will guide...
postgresql COUNT(DISTINCT …) very slow
...
You can use this:
SELECT COUNT(*) FROM (SELECT DISTINCT column_name FROM table_name) AS temp;
This is much faster than:
COUNT(DISTINCT column_name)
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Use ASP.NET MVC validation with jquery ajax?
... where modelState[x].Errors.Count > 0
select new
{
key = x,
errors = modelState[x].Errors.
Select(y => y.ErrorMessage...
How to get a group of toggle buttons to act like radio buttons in WPF?
...ike toggle buttons, but also as radio buttons where only one button can be selected / pressed down at a current time. It also need to have a state where none of the buttons are selected / pressed down.
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Multiline strings in VB.NET
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I used this variant:
Dim query As String = <![CDATA[
SELECT
a.QuestionID
FROM
CR_Answers a
INNER JOIN
CR_Class c ON c.ClassID = a.ClassID
INNER JOIN
CR_Questions q ON q.QuestionID = a.QuestionID
...
configure: error: C compiler cannot create executables
...'ve installed Xcode 4.3.x, you need to launch it, go into its preferences, select the Downloads tab, and click "Install" next to the Command Line Tools package.
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__FILE__, __LINE__, and __FUNCTION__ usage in C++
...docs/papers/2019/p1208r5.pdf
The documentation says:
constexpr const char* function_name() const noexcept;
6 Returns: If this object represents a position in the body of a function,
returns an implementation-defined NTBS that should correspond to the
function name. Otherwise, returns ...
Oracle SQL, concatenate multiple columns + add text
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select 'i like' || type_column || ' with' ect....
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Removing fields from struct or hiding them in JSON Response
...ending back to the caller. I'd now like to allow the caller to be able to select the specific fields they would like returned by passing in a "fields" GET parameter.
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