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Pimpl idiom vs Pure virtual class interface
..." instances of the class at all. When it does make sense, a polymorphic "Clone" method is usually more appropriate. Examples: A Socket class, a Database class, a "policy" class, anything that would be a "closure" in a functional language.
Both pImpl and pure abstract base class are techniques to ...
Why does ReSharper want to use 'var' for everything?
...mendations on SO). To try it out I opened up a recent ASP.NET MVC project. One of the first and most frequent things I've noticed it suggesting is to change most/all my explicit declarations to var instead. For example:
...
What's the best/easiest GUI Library for Ruby? [closed]
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where do you find it now whytheluckstiff is gone?
– knoopx
Dec 16 '09 at 15:31
2
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MySQL ON vs USING?
...t a couple differences are noteworthy:
ON is the more general of the two. One can join tables ON a column, a set of columns and even a condition. For example:
SELECT * FROM world.City JOIN world.Country ON (City.CountryCode = Country.Code) WHERE ...
USING is useful when both tables share a colum...
What is the purpose of the reader monad?
...ur program, but from the time it gets compiled! So what do you do? Well, one option would be to use the Reader monad:
computePrice :: Reader CurrencyDict Dollars
computePrice
= do currencyDict <- ask
--insert computation here
Perhaps the most classic use-case is in implementing i...
How to give border to any element using css without adding border-width to the whole width of elemen
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I've added an answer that allows you to border just one side.
– mikevoermans
May 3 '13 at 16:22
2
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When to use Storyboard and when to use XIBs
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Storyboards make working in a team harder: Because you usually only have one huge storyboard file for your project, having multiple developers regularly making changes to that one file can be a headache: Changes need to be merged and conflicts resolved. When a conflict occurs, it is hard to tell h...
How to return an empty ActiveRecord relation?
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There is a now a "correct" mechanism in Rails 4:
>> Model.none
=> #<ActiveRecord::Relation []>
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Uppercase or lowercase doctype?
...itle>. Only a few HTML validators use SGML. The HTML5 spec is the first one to clarify this: whatwg.org/specs/web-apps/current-work/multipage/…
– Mathias Bynens
Feb 4 '12 at 10:18
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What is a fat JAR? [duplicate]
...erent build systems fat jar is created differently, for example, in Gradle one would create it with (instruction):
task fatJar(type: Jar) {
manifest {
attributes 'Main-Class': 'com.example.Main'
}
baseName = project.name + '-all'
from { configurations.compile.collect { it.is...