david-pm

# Active Nothing - Null Object Pattern
class Bot
  FAUX_DATABASE = [{ id: 1, name: 'KITT' }, { id: 3, name: 'GERTY' }].freeze

  attr_reader :name

  def self.find(id)
    row = FAUX_DATABASE.find{ |r| r[:id] == id }
    return nil if row.nil?
    new(row)

david-pm

require 'net/http'
require 'openssl'

# https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md#general-api-information
# example curl request:
# `curl -H "X-MBX-APIKEY: #{api_key}" -X GET "https://api.binance.com/api/v3/account?recvWindow=100000&timestamp=#{current_time}&signature=#{signature}"`

api_key       = '<replace this with your api_key generated on binance>'
secret_key    = '<replace this with your secret_key generated on binance>'

david-pm

require 'digest'

class Block
  attr_reader :index, :parent, :created_at, :data, :hash

  def initialize(index:, data:, parent: '')
    @index         = index.to_i
    @data          = data
    @parent        = parent.empty? ? '0' : parent
    @created_at    = Time.now.to_s

david-pm

INSTALL:

$ git clone --recursive https://github.com/WebAssembly/wabt
$ cd wabt
$ make clang-release
$ cd out/clang/Release
$ pwd | pbcopy (or just pwd and copy the output manually)

Add the pwd path to your shell config $PATH for ease of use.

david-pm

> rails g controller home index
> rails g channel chat

-------
config/routes.rb:
-------
root 'home#index'

david-pm

return unless Rails.env.development?

MAX_LOG_SIZE = 2.megabytes
logs = File.join(Rails.root, 'log', '*.log')
if Dir[logs].any? { |log| File.size?(log).to_i > MAX_LOG_SIZE }
  $stdout.puts "---------- \033[32m clearing dev logs \033[0m --------------"
  `rails log:clear`
end

david-pm

#!/usr/bin/env ruby

changed_files = `git diff-tree --no-commit-id --name-only --diff-filter=AM -r HEAD`.lines.map(&:chomp)
return if changed_files.empty?

results = `bundle exec rubocop --color #{changed_files.join(" ")}`

no_offenses_detected = results.include?("\e[32mno offenses\e[0m detected")
return if no_offenses_detected

david-pm

# sed -i -f convert_to_snakecase __yourfile__
#
# to run this within in vim:
# %s/[A-Z]/_\L&/g | %s/\<_//g


s/[A-Z]/_\L&/g; s/\b_//g

david-pm

class BankAccount
  attr_reader :balance
  def initialize(starting_balance)
    @balance = starting_balance
  end

  # if this were #irl we'd need to worry about race conditions here
  def deposit(amount)
    @balance += amount
  end

david-pm

#!/bin/bash
# resets HEAD back one commit, recommits with provided message and force pushes to origin

commitmsg=$1

# stole function from: .oh-my-zsh/lib/git.zsh
function current_git_branch() {
  local ref
  ref=$(command git symbolic-ref --quiet HEAD 2> /dev/null)
  local ret=$?