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How is __eq__ handled in Python and in what order?
Since Python does not provide left/right versions of its comparison operators, how does it decide which function to call?
3...
Cross cutting concern example
...he Concern.
A Concern is a term that refers to a part of the system divided on the basis of the functionality.
Concerns are two types:
The concerns representing single and specific functionality for primary requirements are known as core concerns.
OR
Primary functionlity of the system is...
xUnit.net: Global setup + teardown?
...r, it is easy to create one. Just create a base test class that implements IDisposable and do your initialization in the constructor and your teardown in the IDisposable.Dispose method. This would look like this:
public abstract class TestsBase : IDisposable
{
protected TestsBase()
{
...
Should I use a data.frame or a matrix?
...es can make your code far more efficient than using data frames, often considerably so. That is one reason why internally, a lot of R functions will coerce to matrices data that are in data frames.
Data frames are often far more convenient; one doesn't always have solely atomic chunks of data lying...
Why can't yield return appear inside a try block with a catch?
... correctly.
EDIT: Here's a pseudo-proof of how it why it's feasible.
Consider that:
You can make sure that the yield return part itself doesn't throw an exception (precalculate the value, and then you're just setting a field and returning "true")
You're allowed try/catch which doesn't use yield ...
My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
...
There is no enlightened answer, it's just because it's not defined as valid syntax by the C++ language... So it is so, by definition of the language.
If you do have an expression within then it is valid. For example:
((0));//compiles
Even simpler put: because (x) is a valid C++ expression, ...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...ote: Since @INC is used during the compilation phase, this must be done inside of a BEGIN {} block, which precedes the use MyModule statement.
Add directories to the beginning via unshift @INC, $dir.
Add directories to the end via push @INC, $dir.
Do anything else you can do with a Perl array.
...
When should I use jQuery deferred's “then” method and when should I use the “pipe” method?
...values beforehand so that you don't have to do this in both callbacks individually? Yes! And that's what we can use .pipe() for:
deferred.pipe(function(result) {
// result = [{value: 2}, {value: 4}, {value: 6}]
var values = [];
for(var i = 0, len = result.length; i < len; i++) {
...
Updating packages in Emacs
...versions afterwards.
You may also want to take a look at Carton which provides a more convenient way to manage your packages by declaring them in a dedicated file, and includes a convenient command line client to automatically install and upgrade packages declared in this way.
The order of packa...
Clustered vs Non-Clustered
...ows in the database. In other words, applying the clustered index to PersonId means that the rows will be physically sorted by PersonId in the table, allowing an index search on this to go straight to the row (rather than a non-clustered index, which would direct you to the row's location, adding an...