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ESP32 (microcontroller)
Lipo battery 11.1v 2200mah
Generic buck converter 12v to 5v
MPU6050
2 x DRV8825 Stepper Motor Controller
2 x Stepper Motor Nema 17

SpaceVim doc to become proper cheatsheet one day

Core Pillars
Highlighted features
Screenshots
Who can benefit from this?
Update and Rollback
Update SpaceVim itself

GraphQL vs Firebase

With the variety of server-side technologies today, developers have a lot of choices when it comes to deciding what kind of backend to use for their next application.

In this article, we want to explore the differences between GraphQL and Firebase, two very popular server-side technologies.

Overview

Before diving into technical details, let's create some perspective on the two technologies and where they're coming from.

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

Design rules

1: Name the enemy

2: Answer “Why now?”

3: Show the promised land before explaining how you’ll get there

4: Identify obstacles—then explain how you’ll overcome them

5: Present evidence that you’re not just blowing hot air

Main comparison

Traditional CSS

Simple approach, known API
we would have to deal with namespace conflicts
leverages browser caching, storing the entire app style in the first load and reducing following reloads

Style-based implementations

Your challenge, should you accept it, is to write a Ruby library that will modify an existing program to output the number of times a specific method is called.

You solution library should be required at the top of the host program, or via ruby's -r flag (i.e. ruby -r ./solution.rb host_program.rb).

Your solution library should read the environment variable COUNT_CALLS_TO to determine the method it should count. Valid method signatures are Array#map!, ActiveRecord::Base#find, Base64.encode64, etc.

Your solution library should count calls to that method, and print the method signature and the number of times it was called when the program exits.

Also, your solution should have a minimal impact on the program's running time. set_trace_func is a no-go...

SEO

In this list, I will be typically be talking SEO as it relates to Google because Google will likely account for the vast majority of your inbound search traffic. Additionally, if you rank highly on Google, you will probably do well on other search engines anyway. Just like in football if you could play in the Major league you would most likely kill it in the minor league I would begin by explaining why SEO is important talk a little bit about what SEO is about and talk about how those concepts relate to the world wide web. Then talk about some of the things you could do to optimize your site from top to bottom of a typical webpage.

Why it's important

When you want to hide something on google put it on the second page. #SEO @searchdecoder
Winner takes almost everything
More than 80 percent of shoppers research big purchases online first
Opertunity for business
88% Of Consumers Trust Online Reviews As Much As Personal Recommendations
72% Of Consumers Say That Positive Reviews Make Them T

	hash = {
	1 => { c: 2 },
	2 => { c: 4 },
	}

	class Works
	def do(a, c:)
	puts "a: #{a.inspect}; c: #{c.inspect}"
	end
	end

	require 'benchmark'
	require 'sidekiq-ent'
	require 'redis-lock'
	require 'redis-semaphore'
	require 'ruby_redis_lock'

	# monkey patch to remove exponential backoff in pmckee11-redis-lock,
	# otherwise this benchmark does not complete successfully.
	class Redis
	class Lock