Luca Ongaro lucaong

Keybase proof

I hereby claim:

I am lucaong on github.
I am lucaongaro (https://keybase.io/lucaongaro) on keybase.
I have a public key whose fingerprint is EFBB F8B2 E4B5 049F FF03 0B70 4F68 D2C9 63E1 2946

To claim this, I am signing this object:

Configuring multiple WiFi SSID on Nerves

This gist quickly demonstrates my setup to allow multiple WiFi SSID/PSK to be configured at the same time on Nerves. It relies on NervesNetwork, which is a dependency. Currently, this is bound to the "wlan0" interface, but it can be made more generic with little effort.

How it works

In the nerves_network configuration, I omit setting "wlan0" (I want to take care of it myself).

	require 'rack'
	require 'benchmark'

	class OptimizedRackBuilder < Rack::Builder
	def call(env)
	@to_app \|\|= to_app
	@to_app.call(env)
	end
	end

	require './tail_call_optimization'

	class Foo
	extend ::TailCallOptimization

	tailrec def fact(n, k = 1)
	raise ArgumentError, 'n should be >= 1' if n < 1
	return k if n == 1
	fact(n - 1, n * k)
	end

	class Atom(T)
	@state : T
	@channel : Channel::Buffered({(T -> T), Channel::Buffered(T \| ValidationError)})
	@validator : T -> Bool

	def initialize(@state : T, @validator = ->(i : T){ true } : T -> Bool)
	@channel = Channel({(T -> T), Channel::Buffered(T \| ValidationError)}).new(1)
	spawn do
	loop do
	block, c = @channel.receive

	// Safari bug
	// ==========
	//
	// Two strings, that share a prefix after a regexp normalization,
	// are used as keys in an object. Then, they are traversed character
	// by character and recomposed into another string by concatenation,
	// and each is put in an array. When they are used to index the object,
	// the second one is not found among the keys: the reason is that it
	// contains a null byte (copy/paste it into a file and inspect the binary
	// representation, e.g. with `xxd`, to see that).

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>Ore Trascorse</title>
	<style id="jsbin-css">
	body {
	font-family: Helvetica, Arial, sans-serif;
	font-size: 16px;

	/**
	* Usage:
	*
	* import { and, or } from 'minisearch-combiner'
	*
	* and(resultsA, resultsB)
	*
	* or(resultsA, resultsB)
	*
	* and(or(resultsA, resultsB), resultsC)