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How to determine a Python variable's type?
...ring for the type.
e.g.
In [9]: var = 123
In [10]: var?
Type: int
Base Class: <type 'int'>
String Form: 123
Namespace: Interactive
Docstring:
int(x[, base]) -> integer
Convert a string or number to an integer, if possible. A floating point argument will be truncated towa...
Making the Android emulator run faster
...Play Services come packaged with the virtual machines.
(The source of the demoed animation can be found here.)
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How to “perfectly” override a dict?
... write an object that behaves like a dict quite easily with ABCs (Abstract Base Classes) from the collections.abc module. It even tells you if you missed a method, so below is the minimal version that shuts the ABC up.
from collections.abc import MutableMapping
class TransformedDict(MutableMappi...
How to Implement DOM Data Binding in JavaScript
...j = new MyCtor(document.getElementById("foo"), "20");
// simulate some JS based changes.
var i = 0;
setInterval(function() {
obj.change(parseInt(obj.element.value) + ++i);
}, 3000);
DEMO: http://jsfiddle.net/RkTMD/
sh...
Achieving bright, vivid colors for an iOS 7 translucent UINavigationBar
... *colourView = [[UIView alloc] initWithFrame:CGRectMake(0.f, -20.f, 320.f, 64.f)];
colourView.opaque = NO;
colourView.alpha = .7f;
colourView.backgroundColor = barColour;
self.navigationBar.barTintColor = barColour;
[self.navigationBar.layer insertSublayer:colourView.layer atIndex:1];
...
What are the First and Second Level caches in Hibernate?
...an object is
returned by the query, at that time no need to go for a database
transaction. In this way the second level cache works. Here we can use
query level cache also.
Quoted from: http://javabeat.net/introduction-to-hibernate-caching/
...
Event system in Python
...even source classes to derive from pydispatch.Dispatcher.
buslane is class-based, supports single- or multiple handlers and facilitates extensive type hints.
Pithikos' Observer/Event is a lightweight design.
Publish-subscribe libraries:
blinker has some nifty features such as automatic disconnecti...
How do I filter ForeignKey choices in a Django ModelForm?
...rgs)
# access object through self.instance...
self.fields['base_rate'].queryset = Rate.objects.filter(company=self.instance.company)
class ClientAdmin(admin.ModelAdmin):
form = ClientAdminForm
....
You don't need to specify this in a form class, but can do it directly in t...
Why is it impossible to override a getter-only property and add a setter? [closed]
...
Because the writer of Baseclass has explicitly declared that Bar has to be a read-only property. It doesn't make sense for derivations to break this contract and make it read-write.
I'm with Microsoft on this one.
Let's say I'm a new programmer w...
OnChange event handler for radio button (INPUT type=“radio”) doesn't work as one value
..." name="myRadios" value="2" />
</form>
Here's a JSFiddle demo: https://jsfiddle.net/crp6em1z/
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