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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...
Return type of '?:' (ternary conditional operator)
... have a type and - as it's known in the latest C++ standard - a value category.
A conditional expression can be an lvalue or an rvalue. This is its value category. (This is somewhat of a simplification, in C++11 we have lvalues, xvalues and prvalues.)
In very broad and simple terms, an lvalue refers...
Streaming via RTSP or RTP in HTML5
... app that should play back an RTSP/RTP stream from a server http://lscube.org/projects/feng .
8 Answers
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Regex expressions in Java, \\s vs. \\s+
... first one matches a single whitespace, whereas the second one matches one or many whitespaces. They're the so-called regular expression quantifiers, and they perform matches like this (taken from the documentation):
Greedy quantifiers
X? X, once or not at all
X* X, zero or more times
X+ X, one ...
Assignment inside lambda expression in Python
... a list of objects and I want to remove all objects that are empty except for one, using filter and a lambda expression.
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What is the role of the bias in neural networks? [closed]
I'm aware of the gradient descent and the back-propagation algorithm. What I don't get is: when is using a bias important and how do you use it?
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bool operator ++ and --
...code I have come across something which has surprised me. It seems C++ supports ++ (increment) for bool, but not -- (decrement). It this just a random decision, or there is some reason behind this?
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Unknown file type MIME?
...ve to specify a MIME type if the uploaded file has no extension?
In other words is there a default general MIME type?
3 Ans...
“NODE_ENV” is not recognized as an internal or external command, operable command or batch file
I'm trying to setup an environment for a Node.js app. but I'm getting this error every time.
15 Answers
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jQuery set checkbox checked
I already tried all the possible ways, but I still didn't get it working.
I have a modal window with a checkbox I want that when the modal opens, the checkbox check or uncheck should be based on a database value. (I have that already working with others form fields.) I started trying to get it c...