Dev meeting – AIs, interplanetary file systems and Nix

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We had several lighting talks in the dev meeting this week.

Rich talked about WitAI – a language parsing web service that helps with building chatbots. He’s written a “drinksbot” in it, which we used via Slack before the dev meeting to order drinks. You provide it with a corpus of example sentences, and it learns from that.

Chris spoke on the Interplanetary file system. In typical direct file request, you might retrieve it synchronously from a single location. IPFS allows you to retrieve content from a set of distributed stores – essentially a peer-to-peer, torrent-like filesystem, that can be more robust and potentially faster than a direct file retrieval; because content is stored can be stored in a number of places.

Reece talked about antagonistic attacks on neural networks. Because neural networks (e.g. for image recognition) will typically work by perturb the input image to make the neural network recognize it as something entirely different – even though the change to the human might be imperceptible. For example – researchers recently made a model of a turtle (to human eyes) look like a gun (to neural network recognition) to illustrate this issue. This is a problem with neural networks generally – that the neural network may be using very specific things for its recognition, and it may be hard to identify these.

Stephen talked about teaching (very) young developers – like his daughter – to program. There is a lot of implicit knowledge and setup and background in a typical dev environment, and you want to get to working code as quickly as possible. HTML 5 and JavaScript are good for this. You should optimize for small victories, and concentrate on fast feedback loops.

Tim talked about Vue, the JS framework. You create reusable components that have an HTML component and some connected JavaScript that can control . It’s somewhere in the middle in terms of ease of use – it’s more complicated and powerful than Knockout, but simpler and more usable than React and Angular (and it can be used initially just by including script tags, and then extended to manage things like transpilation). We’re using it in a number of projects at present.

Rodney talked about “Where I’ve been” – specifically about the Nix conference that he recently attended. There is a new Nix tool for handling packaging and building in the Nix system, which has a simpler (command-line) UI. Another talk was about the security developments to the Nix project, such as having specific security experts who can getting security notifications from other projects early on; about automated scanning tools for scanning deployed Nix implementations for security holes. Nix in production was being discussed – e.g. for a company that’s doing cycle dock management in the Netherlands. Using Nix throughout an entire environment, from development through to production, brings many advantages. At Tumblr, Nix is used for testing of live SQL instance replication. Then there was a Hackfest – with spontaneous collaboration, and good work done on Nix cross-compilation.

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