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Inheritance and Overriding __init__ in python
...
The book is a bit dated with respect to subclass-superclass calling. It's also a little dated with respect to subclassing built-in classes.
It looks like this nowadays:
class FileInfo(dict):
"""store file metadata"""
def __init__(self, filename=None):
super(FileInfo,...
efficient way to implement paging
...ple?
We don't use LINQ or straight access to the tables as we require the extra layer of security (granted the dynamic SQL breaks this somewhat).
Something like this should do the trick. You can add in parameterized values for parameters, etc.
exec sp_executesql 'WITH MyCTE AS (
SELECT TOP (...
What is the difference between the Eclipse Package Explorer and the Eclipse Project Explorer?
...ther languages and project types as well.
Additional plugins contributes "extra information" to the Project Explorer view making it much more "sophisticated". For example if you have the web tools installed and you have a Dynamic Web Project, the Project Explorer shows you additional tree nodes lik...
Why does C# not provide the C++ style 'friend' keyword? [closed]
...ly define which members are being passed between the two classes, which is extra work but may also make the code easier to understand.
If somebody has an example of a reasonable use of "friend" that cannot be simulated using interfaces, please share it! I'd like to better understand the difference...
Android notification is not showing
...ome obsoletes
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
String channelId = "Your_channel_id";
NotificationChannel channel = new NotificationChannel(
channelId,
"Channel human readable title",
...
What is the id( ) function used for?
... Python objects.
Is it the same with memory addresses in C?
Conceptually, yes, in that they are both guaranteed to be unique in their universe during their lifetime. And in one particular implementation of Python, it actually is the memory address of the corresponding C object.
If yes, wh...
How to change ProgressBar's progress indicator color in Android
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I copied this from one of my apps, so there's prob a few extra attributes, but should give you the idea. This is from the layout that has the progress bar:
<ProgressBar
android:id="@+id/ProgressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_wi...
Hidden features of Ruby
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If items is a string you don't have to enclose it with [*…]. String.each doesn't iterate over characters as some may expect. It just returns itself to the block.
– mxcl
Feb 17 '10 at 13:49
...
WPF chart controls [closed]
...rts lots of 2D charts and zooming without animation, might need to do some extra work for smoother zooming.(This service is no longer available)
DevExpress ChartControl. Supports most common 2D Series types, zooming and panning (scrolling) operations can be performed using the mouse, keyboard, and t...
Python hashable dicts
...n algol-like language (as apposed to the syntax free lisp dialects you normally find them in). Because of this, different passes through the input might see different grammars, so cached parse results are invalid, unless I also store the current version of the grammar along with the cached parse re...