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How to use SCNetworkReachability in Swift

... imported C structs have a default initializer in Swift, which initializes all of the struct's fields to zero, so the socket address structure can be initialized with var zeroAddress = sockaddr_in() sizeofValue() gives the size of this structure, this has to be converted to UInt8 for sin_len: zer...
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Input and output numpy arrays to h5py

I have a Python code whose output is a sized matrix, whose entries are all of the type float . If I save it with the extension .dat the file size is of the order of 500 MB. I read that using h5py reduces the file size considerably. So, let's say I have the 2D numpy array named A . How do I ...
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Determine what attributes were changed in Rails after_save callback?

I'm setting up an after_save callback in my model observer to send a notification only if the model's published attribute was changed from false to true. Since methods such as changed? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as fol...
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Disable button in jQuery

... Here is a small fiddle I created. Please let me what I'm doing wrong. jsfiddle.net/2Nfu4/3 – user2047817 Feb 28 '13 at 17:48 ...
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How to clear the interpreter console?

Like most Python developers, I typically keep a console window open with the Python interpreter running to test commands, dir() stuff, help() stuff , etc. ...
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Which websocket library to use with Node.js? [closed]

... Getting the ball rolling with this community wiki answer. Feel free to edit me with your improvements. ws WebSocket server and client for node.js. One of the fastest libraries if not the fastest one. websocket-node WebSocket server and ...
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Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?

...errupt the entire iPython Notebook server. This will stop iPython Notebook alltogether, which means it won't be possible to restart or save your work, so this is obviously not a great solution (you need to hit CTRL+C twice because it's a safety feature so that people don't do it by accident). In cas...
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How to build & install GLFW 3 and use it in a Linux project

... Step 1: Installing GLFW 3 on your system with CMAKE For this install, I was using KUbuntu 13.04, 64bit. The first step is to download the latest version (assuming versions in the future work in a similar way) from www.glfw.org, probably ...
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How to convert vector to array

...making a pointer that points to the actual array the vector is using internally. If you want to copy GMan's answer explains how – Michael Mrozek May 27 '10 at 17:22 4 ...
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Python, Unicode, and the Windows console

...at's the best way around this? Is there any way I can make Python automatically print a ? instead of failing in this situation? ...