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Error in Swift class: Property not initialized at super.init call
I have two classes, Shape and Square
12 Answers
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How does Windows 8 Runtime (WinRT / Windows Store apps / Windows 10 Universal App) compare to Silver
...at is used to create Metro style apps. I know you can use it with XAML and it is based on .NET so C# and VB.NET can be used to write the apps, but then it seems to have something to do with HTML, CSS, DOM, and JavaScript.
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Significant new inventions in computing since 1980
...World Wide Web ("distributed hypertext via simple mechanisms") as proposed and implemented by Tim Berners-Lee started in 1989/90.
While the idea of hypertext had existed before (Nelson’s Xanadu had tried to implement a distributed scheme), the WWW was a new approach for implementing a distribute...
Unit testing code with a file system dependency
...at you clean up after youself -- delete any temporary files you created -- and that you don't accidentally overwrite an existing file that happened to have the same filename as a temporary file you were using. Always use relative paths and not absolute paths.
It would also be a good idea to chdir(...
What does functools.wraps do?
...g
def f(x):
"""does some math"""
return x + x * x
f = logged(f)
and your function f is replaced with the function with_logging. Unfortunately, this means that if you then say
print(f.__name__)
it will print with_logging because that's the name of your new function. In fact, if you lo...
Should operator
...tly defining the bool relationship operators.
The operator:
Equality == and !=
Relationship < > <= >=
These operators should return a bool as they are comparing two objects of the same type. It is usually easiest to define these operators as part of the class. This is because a clas...
What does middleware and app.use actually mean in Expressjs?
... haven't found a clear, concise explanation of what middleware actually is and what the app.use statement is doing. Even the express docs themselves are a bit vague on this. Can you explain these concepts for me please?
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JSF backing bean structure (best practices)
...et people's opinions on best practices for the interface between JSF pages and backing beans.
6 Answers
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Detect encoding and make everything UTF-8
I'm reading out lots of texts from various RSS feeds and inserting them into my database.
24 Answers
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Determine the type of an object?
...ry, or something else? I am getting an object back that may be either type and I need to be able to tell the difference.
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