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Why use Abstract Base Classes in Python?
... of duck typing in Python, I fail to understand the need for ABC (abstract base classes). The help is good on how to use them.
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How to repeat a “block” in a django template
...the same django template. I want this block to appear more than once in my base template:
14 Answers
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Pass data to layout that are common to all pages
...you are required to pass the same properties to each page, then creating a base viewmodel that is used by all your view models would be wise. Your layout page can then take this base model.
If there is logic required behind this data, then this should be put into a base controller that is used by a...
Design Patterns web based applications [closed]
I am designing a simple web-based application. I am new to this web-based domain.I needed your advice regarding the design patterns like how responsibility should be distributed among Servlets, criteria to make new Servlet, etc.
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Is there a way to get a collection of all the Models in your Rails app?
...use Ruby reflection to search for every classes that extends ActiveRecord::Base. Don't know how you can list all the classes though...
EDIT: Just for fun, I found a way to list all classes
Module.constants.select { |c| (eval c).is_a? Class }
EDIT: Finally succeeded in listing all models without ...
Using Sass Variables with CSS3 Media Queries
... SASS grabbed all rules and properties in your stylesheet containing your $base_width variable and copied/changed them accordingly.
Since it won't work automatically you could do it by hand like this:
@media screen and (max-width: 1170px)
$base_width: 960px // you need to indent it to (re)se...
Why should I declare a virtual destructor for an abstract class in C++?
I know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
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Modify file in place (same dest) using Gulp.js and a globbing pattern
...as the globbed path is used for the dest as well. Simply pipe to the same base directory you're globbing the src from, in this case "sass":
gulp.src("sass/**/*.scss")
.pipe(sass())
.pipe(gulp.dest("sass"));
If your files do not have a common base and you need to pass an array of paths, this ...
Why do I have to access template base class members through the this pointer?
...le in template <typename T> struct Foo : T::A {};, T::A is used as a base class and hence is unambiguously a type. If Foo is instantiated with some type that has a data member A instead of a nested type A, that's an error in the code doing the instantiation (phase 2), not an error in the templ...
Overriding fields or properties in subclasses
I have an abstract base class and I want to declare a field or a property that will have a different value in each class that inherits from this parent class.
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