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Why not abstract fields?
...I could do that of course. And I had thought of it. But why do I have to set a value in the base class when I know for a fact that I'm going to override that value in every derived class? Your argument could also be used to argue that there is no value in allowing abstract methods either.
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How can I create a copy of an object in Python?
...rmost container.
list.copy is a shallow copy:
>>> list_of_dict_of_set = [{'foo': set('abc')}]
>>> lodos_copy = list_of_dict_of_set.copy()
>>> lodos_copy[0]['foo'].pop()
'c'
>>> lodos_copy
[{'foo': {'b', 'a'}}]
>>> list_of_dict_of_set
[{'foo': {'b', 'a'}}]...
Is there a JavaScript / jQuery DOM change listener?
...webpage script), I need a way simply observe changes in DOM state. I could set up polling but that seems sloppy.
5 Answers
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Does const mean thread-safe in C++11?
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class rect {
int width = 0, height = 0;
public:
/*...*/
void set_size( int new_width, int new_height ) {
width = new_width;
height = new_height;
}
int area() const {
return width * height;
}
};
The member-function area is thread-safe; not because it...
Django, creating a custom 500/404 error page
...py add your own custom implementation of the following two views, and just set up the templates 404.html and 500.html with what you want to display.
With this solution, no custom code needs to be added to urls.py
Here's the code:
from django.shortcuts import render_to_response
from django.templat...
How to replace a set of tokens in a Java String?
... another is that it doesnt work dynamically, being able to have a dataset of keys/values and then apply it to any string
– Brad Parks
Oct 28 '19 at 18:25
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HorizontalAlignment=Stretch, MaxWidth, and Left aligned at the same time?
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You can set HorizontalAlignment to Left, set your MaxWidth and then bind Width to the ActualWidth of the parent element:
<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsof...
How can I copy data from one column to another in the same table?
...
How about this
UPDATE table SET columnB = columnA;
This will update every row.
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How to add a button to UINavigationBar?
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Sample code to set the rightbutton on a NavigationBar.
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
style:UIBarButtonItemStyleDone target:nil action:nil];
UINavigationItem *item = [[UINavigationItem al...
Where is the IIS Express configuration / metabase file found?
...obalApplicationHostFile>true|false</UseGlobalApplicationHostFile> setting in the project file (eg: MyProject.csproj). (source: MSDN forum)
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