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What is the copy-and-swap idiom?
...s arguably the most nuanced and difficult. How should it be done? What pitfalls need to be avoided?
The copy-and-swap idiom is the solution, and elegantly assists the assignment operator in achieving two things: avoiding code duplication, and providing a strong exception guarantee.
How does it wor...
Creating a blocking Queue in .NET?
...threads reading from the same queue. If the queue reaches a specific size all threads that are filling the queue will be blocked on add until an item is removed from the queue.
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Evenly space multiple views within a container view
Auto Layout is making my life difficult. In theory, it was going to be really useful when I switched, but I seem to fight it all of the time.
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Print current call stack from a method in Python code
In Python, how can I print the current call stack from within a method (for debugging purposes).
7 Answers
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What does bundle exec rake mean?
...cutables without bundle exec may work, if the executable happens to be installed in your system and does not pull in any gems that conflict with your bundle.
However, this is unreliable and is the source of considerable pain. Even if it looks like it works, it may not work in the future or on a...
Get name of property as a string
...ge and video processing, you should use C or C++. but for the other 95% of applications, a managed code framework will be fast enough. Eventually C# is also compiled to machine code, and you can even pre-compile it to native if you want.
– Tsahi Asher
Jan 18 '1...
Why dict.get(key) instead of dict[key]?
...
It allows you to provide a default value if the key is missing:
dictionary.get("bogus", default_value)
returns default_value (whatever you choose it to be), whereas
dictionary["bogus"]
would raise a KeyError.
If omitted...
ASP.NET: This method cannot be called during the application's pre-start initialization stage
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I see. It automatically defines security and membership rules so you have to override them before you add custom ones. Tricky.
– Jonathan Allen
May 25 '11 at 8:46
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How to change progress bar's progress color in Android
... The reason is because I'm creating the progress bar dynamically, and setting its color upon user request. Since I usually use code for building my GUI screen and components, I'm not familiar with the attached XML and I don't know what's a layer-list (although I'm guessing that you ar...
How do I detect a click outside an element?
...instead of the jQuery part.
But element.closest() is now also available in all major browsers (the W3C version differs a bit from the jQuery one).
Polyfills can be found here: Element.closest()
Edit – 2020-05-21
In the case where you want the user to be able to click-and-drag inside the element, t...