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What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?
...fore you can understand these technologies, you have to understand classic HTTP web traffic first.
Regular HTTP:
A client requests a webpage from a server.
The server calculates the response
The server sends the response to the client.
Ajax Polling:
A client requests a webpage from a serve...
How to print Boolean flag in NSLog?
Is there a way to print value of Boolean flag in NSLog?
11 Answers
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Mocha / Chai expect.to.throw not catching thrown errors
... Nope, see the explanation I've added while you were writing your comment.
– Louis
Feb 5 '14 at 20:02
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OnInitUpdate、OnUpdate、OnDraw与OnPaint - C/C++ - 清泛网 - 专注C/C++及内核技术
...，应用程序框架在CView::OnInitialUpdate 和CDocument::UpdateAllViews 的默认实现中都会调用。
OnUpdate，OnUpdate的默认实现是通过Invalidate产生WM_PAINT，这时OnDraw又被调用了。
OnDraw除了你和应用程序框架间接调用外，window还可能间接调用它...
What is the official “preferred” way to install pip and virtualenv systemwide?
...install the latest Python (2.7.9 and up) Pip is now bundled with it.
See: https://docs.python.org/2.7//installing/index.html
If not :
Update (from the release notes):
Beginning with v1.5.1, pip does not require setuptools prior to running get-pip.py. Additionally, if setuptools (or distribute) ...
How do I start a process from C#?
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I used the following in my own program.
Process.Start("http://www.google.com/etc/etc/test.txt")
It's a bit basic, but it does the job for me.
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Add up a column of numbers at the Unix shell
Given a list of files in files.txt , I can get a list of their sizes like this:
20 Answers
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How do you make a web application in Clojure? [closed]
...By far the best Clojure web framework I have yet encountered is Compojure: http://github.com/weavejester/compojure/tree/master
It's small but powerful, and has beautifully elegant syntax. (It uses Jetty under the hood, but it hides the Servlet API from you unless you want it, which won't be often)....
Do HTML WebSockets maintain an open connection for each client? Does this scale?
...ange those clients into WebSockets clients and it just might be feasible.
HTTP connections, while they don't create open files or consume port numbers for a long period, are more expensive in just about every other way:
Each HTTP connection carries a lot of baggage that isn't used most of the tim...
is not JSON serializable
...objects:
data = serializers.serialize('json', self.get_queryset())
return HttpResponse(data, content_type="application/json")
In your case, self.get_queryset() contains a mix of django objects and dicts inside.
One option is to get rid of model instances in the self.get_queryset() and replace th...