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• Finding the shortest path between two points on a grid, using Haskell.

  - by esperantist

  This is a problem that I can easily enough solve in a non-functional manner. But solving it in Haskell is giving me big problems. Me being inexperienced when it comes to functional programming is surely a reason. The problem: I have a 2D field divided into rectangles of equal size. A simple grid. Some rectangles are empty space (and can be…

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• What exactly does raw microphone data represent?

  - by esperantist

  I'm using PyAudio, a PortAudio wrapper for Python. I'm getting data from a microphone. Data which is represented by a continuous stream of bytes divided into chunks (of a size determined by me). I've tried to plot the signal, assuming the bytes represent the current signal amplitude, but I get an interesting image that I can't easily…

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• How do I reuse a previously-opened port, using SBCL's sockets?

  - by esperantist

  Creating a server-side socket will fail if I'm trying to use the same port I've used before. An address-in-use error occurs. (make-instance 'sb-bsd-sockets:inet-socket :type :stream :protocol :tcp) How do I stop this from happening? Hints and code snippets very welcome! (CL newbie here.) Thanks!

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