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How does deriving work in Haskell?
...-). This is to say that automatic deriving is baked into the Haskell spec, and every compiler can choose to implement it in its own way. There's lots of work on how to make it extensible however.
Derive is a tool for Haskell to let you write your own deriving mechanisms.
GHC used to provide a deri...
Which @NotNull Java annotation should I use?
...make my code more readable as well as use tooling like IDE code inspection and/or static code analysis (FindBugs and Sonar) to avoid NullPointerExceptions. Many of the tools seem incompatible with each others' @NotNull / @NonNull / @Nonnull annotation and listing all of them in my code would be t...
When should I really use noexcept?
...r every function declaration would greatly reduce programmer productivity (and frankly, would be a pain).
Well, then use it when it's obvious that the function will never throw.
When can I realistically expect to observe a performance improvement after using noexcept? [...] Personally, I care ...
Rich vs Anemic Domain Model [closed]
... deciding if I should use a Rich Domain Model over an Anemic Domain Model, and looking for good examples of the two.
10 Ans...
OS detecting makefile
I routinely work on several different computers and several different operating systems, which are Mac OS X, Linux, or Solaris. For the project I'm working on, I pull my code from a remote git repository.
...
Why are private fields private to the type, not the instance?
In C# (and many other languages) it's perfectly legitimate to access private fields of other instances of the same type. For example:
...
How to reference style attributes from a drawable?
...
Add your drawable to your theme.xml.
<style name="MyTheme" parent="@android:style/Theme.NoTitleBar">
<item name="my_drawable">@drawable/my_drawable</item>
</style>
Reference your drawable in your layout using your attribute.
<TextView android:background="?my_draw...
To Workflow or Not to Workflow?
... weight insurance claims system. The system involves a lot of manual tasks and business workflows and we are looking at using Windows Workflow (.NET 4.0).
...
What are the differences between Abstract Factory and Factory design patterns?
... Difference Between The Two
The main difference between a "factory method" and an "abstract factory" is that the factory method is a method, and an abstract factory is an object. I think a lot of people get these two terms confused, and start using them interchangeably. I remember that I had a hard ...
Adding 'serial' to existing column in Postgres
...
Look at the following commands (especially the commented block).
DROP TABLE foo;
DROP TABLE bar;
CREATE TABLE foo (a int, b text);
CREATE TABLE bar (a serial, b text);
INSERT INTO foo (a, b) SELECT i, 'foo ' || i::text FROM generate_series(1, 5) i;...