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C#: Abstract classes need to implement interfaces?
...ss, you simply define those members with the abstract keyword:
interface IFoo
{
void Bar();
}
abstract class Foo : IFoo
{
public abstract void Bar();
}
Or to put it another way: you don't have to "implement" it (which would be a terrible limitation on abstract classes); however, in C#, y...
Django admin: how to sort by one of the custom list_display fields that has no database field
...y_set().annotate(models.Count('order'))
class Customer(models.Model):
foo = models.CharField[...]
objects = CustomerManager()
def number_of_orders(self):
return u'%s' % Order.objects.filter(customer=self).count()
number_of_orders.admin_order_field = 'order__count'
EDIT: ...
How to send POST request?
...rl = 'https://httpbin.org/post' # Set destination URL here
post_fields = {'foo': 'bar'} # Set POST fields here
request = Request(url, urlencode(post_fields).encode())
json = urlopen(request).read().decode()
print(json)
Sample output:
{
"args": {},
"data": "",
"files": {},
"form": ...
Hibernate Annotations - Which is better, field or property access?
...ion goodness to inherit into 8 concrete subclasses:
public abstract class Foo<T extends Bar> {
T oneThing;
T anotherThing;
// getters and setters ommited for brevity
// Lots and lots of implementation regarding oneThing and anotherThing here
}
Now exactly how should you ...
How do I specify a single test in a file with nosetests?
...ested by attrib do not exist in a segregated space. So if you test with -a foo and your class contains foo = "platypus", then all tests in the class will be selected by the plugin.
share
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improve t...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
...er the following scenario:
WebElement element = driver.findElement(By.id("foo"));
// DOM changes - page is refreshed, or element is removed and re-added
element.click();
Now at the point where you're clicking the element, the element reference is no longer valid. It's close to impossible for WebD...
What are five things you hate about your favorite language? [closed]
...building your own function, or using the '@' operator:
$x = isset($_POST['foo']['bar']) ? $_POST['foo']['bar'] : null;
6) Bonus answer: '@'. If you can't be bothered writing your code correctly, just add '@', and too bad for anyone who has to debug your code later.
...
How to escape a JSON string to have it in a URL?
... safely URL encode parts of a query string:
var array = JSON.stringify([ 'foo', 'bar' ]);
var url = 'http://example.com/?data=' + encodeURIComponent(array);
or if you are sending this as an AJAX request:
var array = JSON.stringify([ 'foo', 'bar' ]);
$.ajax({
url: 'http://example.com/',
t...
How to save username and password with Mercurial?
...like so:
[auth]
bb.prefix = https://bitbucket.org/repo/path
bb.username = foo
bb.password = foo_passwd
The ‘bb’ part is an arbitrary identifier and is used to match prefix with username and password - handy for managing different username/password combos with different sites (prefix)
You can...
Spring @Autowired usage
... So a full layer of abstract indirections (where you would wire bean-name "foo" into bean "bar") is gone. Now I wire the "Foo" interface into my bean directly, and implementation is chosen by run-time profile. This allows me to work with code when tracing dependencies and implementations. When I see...