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Antonio Carlos da Graça Mota Durão de Souza acdesouza

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@motorailgun
motorailgun / idea.md
Last active November 16, 2023 03:13
Installing Windows and Linux into the same partition

Installing Windows and Linux into the same partition

But WHY?

There was a reddit post about installing Arch on NTFS3 partition. Since Windows and Linux doesn't have directories with same names under the /(C:\), I thought it's possible, and turned out it was actually possible.
If you are not familiar to Linux, for example you've searched on Google "how to dualboot Linux and Windos" or brbrbr... you mustn't try this. This is not practical.

Pre-requirements

  • UEFI system
  • Any Linux live-boot CD/DVD/USB... with Linux kernel newer than 5.15
  • Windows installer USB
@rponte
rponte / using-uuid-as-pk.md
Last active May 9, 2024 18:51
Não use UUID como PK nas tabelas do seu banco de dados

Pretende usar UUID como PK em vez de Int/BigInt no seu banco de dados? Pense novamente...

TL;TD

Não use UUID como PK nas tabelas do seu banco de dados.

Um pouco mais de detalhes

@romainl
romainl / path.md
Last active April 17, 2024 07:42
Off the beaten path

Off the beaten path

What is &path used for?

Vim uses :help 'path' to define the root directories from where to search non-recursively for files.

It is used for:

  • gf, gF, <C-w>f, <C-w>F, <C-w>gf, <C-w>gF,
  • :find, :sfind, :tabfind,
@rponte
rponte / HowToUseIt.java
Last active December 30, 2023 14:37
THEORY: Example of a simple Single Thread Pool implementation in Java
public class HowToUseIt {
/**
* Usually we'll have a single instance per client
*/
private static final SingleThreadPool THREAD_POOL = new SingleThreadPool();
public void executeAsync() {
try {
@mrispoli24
mrispoli24 / setting-up-heroku-and-cloudflare.md
Created October 15, 2018 18:41
Setting up Heroku and Cloudflare (the right way)

Setting up Heroku and Cloudflare (the right way)

The following outlines how to setup Heroku + Cloudflare with a full SSL certificate. What this means is that communication between the browser and the Cloudflare CDN is encrypted as well as communication between Cloudflare and Heroku’s origin server. Follow these steps exactly and the setup is a breeze.

Step 1: Set up domain names in Heroku

First you want to add the root domain and the www domain to heroku. You do this by clicking into your production application, then going to settings and then scrolling down to Domains and certificates.

Here you will add <your_domain>.com and www.<your_domain>.com. This will give you two CNAME records. They will look something like <your_domain>.com.herokudns.com and www.<your_domain>.com.herokudns.com.

Step 2: Add CNAME records to Cloudfare.

@brianhempel
brianhempel / bench_rails_memory_usage.rb
Last active October 6, 2022 12:47
A script to test the memory usage of your Rails application over time. It will run 30 requests against the specified action and report the final RSS. Choose the URL to hit on line 45 and then run with `ruby bench_rails_memory_usage.rb`.
require "net/http"
def start_server
# Remove the X to enable the parameters for tuning.
# These are the default values as of Ruby 2.2.0.
@child = spawn(<<-EOC.split.join(" "))
XRUBY_GC_HEAP_FREE_SLOTS=4096
XRUBY_GC_HEAP_INIT_SLOTS=10000
XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0
@rbishop
rbishop / carl_hewitt_actor_model.md
Last active April 3, 2024 06:58
Notes from Carl Hewitt on the Actor Model

Carl Hewitt on Actors

Actor - Fundamental unit of computation, a computation model - not just a form of concurrency

An Actor has three essential elements:

  • 1 - Processing - you have to get something done
  • 2 - Storage - you have to be able to remember things
  • 3 - Communication
class PostsController < ActionController::Base
def create
Post.create(post_params)
end
def update
Post.find(params[:id]).update_attributes!(post_params)
end
private
@klauswuestefeld
klauswuestefeld / gist:1595701
Created January 11, 2012 17:22
O Ciclo Vicioso Do Software Retranqueiro
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