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What Does Question Mark Mean in Xcode Project Navigator?
In the project navigator in Xcode, I am not sure what the ? is trying to tell me next to the file name.
7 Answers
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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
I have read many posts on SO and the web regarding the keywords in my question title and learned a lot from them. Some of the questions I read are related to specific implementation challenges while others focus on general concepts. I just want to make sure I understood all of the concepts and the r...
Why are C# 3.0 object initializer constructor parentheses optional?
It seems that the C# 3.0 object initializer syntax allows one to exclude the open/close pair of parentheses in the constructor when there is a parameterless constructor existing. Example:
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What is the purpose of the reader monad?
The reader monad is so complex and seems to be useless. In an imperative language like Java or C++, there is no equivalent concept for the reader monad, if I am not mistaken.
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How to calculate time elapsed in bash script?
I print the start and end time using date +"%T" , which results in something like:
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How to strip all whitespace from string
... python string? For example, I want a string like strip my spaces to be turned into stripmyspaces , but I cannot seem to accomplish that with strip() :
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What's the difference between a continuation and a callback?
I've been browsing all over the web in search of enlightenment about continuations, and it's mind boggling how the simplest of explanations can so utterly confound a JavaScript programmer like myself. This is especially true when most articles explain continuations with code in Scheme or use monads....
How to make the python interpreter correctly handle non-ASCII characters in string operations?
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Python 2 uses ascii as the default encoding for source files, which means you must specify another encoding at the top of the file to use non-ascii unicode characters in literals. Python 3 uses utf-8 as the default encoding for source...
How to use knockout.js with ASP.NET MVC ViewModels?
Bounty
3 Answers
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Why doesn't Java allow generic subclasses of Throwable?
According to the Java Language Sepecification , 3rd edition:
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