asaaki

# frozen_string_literal: true
source 'https://rubygems.org'

gem 'puma'
gem 'sinatra'
gem 'sinatra-contrib'

asaaki

Boolean Environment Variables

Don't overcomplicate things.

I've seen a lot of parse the env var and match it against some known values like:

env_var = ENV['FEATURE_ONE']
case env_var.to_s.downcase
when 'true', 't', 'yes', 'y', 'on', '1' then true

asaaki

[*('A'..'Z'), *('a'..'z')].map do |c|
  puts [c, eval("%#{c}(ls)")].inspect
rescue Exception
  puts "#{c} not allowed"
end; 0

asaaki

### Experiments

# https://ruby-doc.org/core-2.5.0/SizedQueue.html
log = SizedQueue.new(100)
# https://ruby-doc.org/core-2.5.0/Queue.html
queue = Queue.new
# https://ruby-doc.org/core-2.5.0/ThreadGroup.html
group = ThreadGroup.new # pool
5.times do |i|
  # https://ruby-doc.org/core-2.5.0/Thread.html

asaaki

#include <Adafruit_NeoPixel.h>
#include <avr/power.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>

#define STRIP_PIN 6
#define TRIGGER_PIN 2
#define CONTROL_LED 13

// Note: this duration should be also longer than the HIGH time of the PIR

asaaki

#!/bin/sh

targets=(armv7-unknown-linux-musleabihf thumbv7em-none-eabi armv7-unknown-linux-musleabihf)
toolchains=(stable beta nightly)

for toolchain in $toolchains; do
  for target in $targets; do
    echo "--> toolchain $toolchain and target $target"
    rustup target install $target --toolchain $toolchain
    # rustup target remove $target --toolchain $toolchain

asaaki

require 'spec_helper'

module CallableSubject
  def callable_subject(&_block)
    subject { -> { yield } }
  end
end

RSpec.configure do |c|
  c.extend(CallableSubject)

asaaki

use std::ops::Deref;

struct StateFn(fn(&mut Machine) -> StateFn);

impl Deref for StateFn {
    type Target = fn(&mut Machine) -> StateFn;
    
    fn deref(&self) -> &Self::Target {
        &self.0
    }

asaaki

Rust, serde-json, wasm, parcel.js

With this combination it is fairly easy to get things done in Rust and utilize it in JavaScript. Yay!

asaaki

/*
gist is: return a ref to c_char and the length of it (via 2 functions)

C example: https://wasdk.github.io/WasmFiddle//?w590f
*/
use std::ffi::CString;
use std::os::raw::c_char;

static HELLO: &'static str = "hello from rust";