hieuk09

require 'rom'
require 'rom-repository'

rom = ROM.container(:sql, 'sqlite::memory') do |conf|
  conf.default.create_table(:users) do
    primary_key :id
    column :name, String, null: false
  end

  class Users < ROM::Relation[:sql]

hieuk09

Display

• PPU has 3x cycle speed compare to CPU
• PPU can render upto 64 sprite
• Sprite could be 8x16 or 8x8
• Color is specified by 2 bit in the pattern table, and 2 bit in the attribute table

Instruction set

• Instruction set is based on addressing mode
• The opcode is a 4 byte number

hieuk09

Note on NES specification

Introduction

NES is Nintendo Entertainment System, a gaming console which is popular in 1980s

Hardware Overview

Since I'm reading the specification while implementing the emulator for Chip8, there will be some comparison between them.

hieuk09

describe "validations" do
  it "validates presence of github_username" do
    acceptance = build(:acceptance, github_username: "")

    expect(acceptance).to be_invalid
    expect(acceptance.errors[:github_username]).to eq(["can't be blank"])
  end

  it "bubbles up user validations" do
    acceptance = build(:acceptance, password: "")

hieuk09

 #!/bin/bash

 array=("master" "acts_as_api" "active_model_serializers" "jbuilder" "jbuilder_with_partial" "rabl" "roar")
 for i in "${array[@]}"
 do
   env -i git checkout $i
   rspec
 done

hieuk09

require 'open-uri'
require 'fileutils'
require 'ruby-progressbar'

progress_bar = ProgressBar.create(
  starting_at: 0,
  total: nil,
  format: "%a %B %p%% %r KB/sec",
  rate_scale: lambda { |rate| rate / 1024 }
)

hieuk09

namespace :something do
  task execute_patch: :environment do
    # OtherClass is used in MyClass
    OtherClass.class_eval do
      def foo
        'bar'
      end
    end
    
    loop do

hieuk09

class Animal
  def name
    'animal'
  end
end

class Cow < Animal
  def name
    'cow'
  end

hieuk09

Sublime Text 2 – Useful Shortcuts (PC)

Loosely ordered with the commands I use most towards the top. Sublime also offer full documentation.

Editing

Ctrl+C	copy current line (if no selection)
Ctrl+X	cut current line (if no selection)
Ctrl+⇧+K	delete line
Ctrl+↩	insert line after

hieuk09

// ==UserScript==
// @name        Unfriend In Single-Click on Facebook by Cha
// @description This script is useful if you don't want to delete each friends one by one.
// @namespace   Cha
// @include      *.facebook.com/*
// @require       http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js
// @version     3.6.1
// ==/UserScript==
// Developed by Cha(Muhammad Rafizan) - http://fb.com/cha.dae.woong.sunbae