Lord Norlan Mumar lmumar

Overall

This documents the upgrade from Rails 4.2 to 5.2 through four parts: Backend, Frontend, Infrascture and Checkboxes

Backend

Rails update task

Run rake command rails app:update, it creates a set of new configration files for active storage, action cable, content security policy etc. As we dont use these features, the default ones from code generation are kept.

This project is a tiny compiler for a very simple language consisting of boolean expression.

The language has two constants: 1 for true and 0 for false, and 4 logic gates: ! (not), & (and), | (or), and ^ (xor).

It can also use parentheses to manage priorities.

Here is its grammar in BNF format:

expr ::= "0" | "1"

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

How to create small, unique tokens in Ruby

That is is basically a "fork" of blog article i'm constantly returning to. It seems that the blog is down:

My choice: Dave Bass’s rand().to_s() trick

Dave Bass proposed this which I picked up for my implementation (here for an 8-chars token):

	#include <iostream>
	#include <vector>
	#include <algorithm>
	#include <random>
	#include <iterator>
	#include <string>
	#include <sstream>
	#include <cassert>

	class Card {

	/*
	* To compile: g++ opencv_test2.cpp -o opencv_test2 $(pkg-config --cflags --libs opencv)
	*/
	#include <opencv2/opencv.hpp>
	#include <opencv2/tracking.hpp>
	#include <opencv2/core/ocl.hpp>
	#include <unistd.h>

	using namespace cv;
	using namespace std;

	require 'sidekiq/api'

	# 1. Clear retry set

	Sidekiq::RetrySet.new.clear

	# 2. Clear scheduled jobs

	Sidekiq::ScheduledSet.new.clear

	import invariant from "tiny-invariant";

	class AmalgoBox extends HTMLElement {
	get input() {
	return this.querySelector("input") as HTMLInputElement;
	}

	get button() {
	return this.querySelector("button") as HTMLButtonElement;
	}

	brew tap homebrew/versions
	brew install v8-315

	gem install libv8 -v '3.16.14.13' -- --with-system-v8
	gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

	bundle install

	//
	// Author: Jonathan Blow
	// Version: 1
	// Date: 31 August, 2018
	//
	// This code is released under the MIT license, which you can find at
	//
	// https://opensource.org/licenses/MIT
	//
	//