KelseyDH

// ==UserScript==
// @name        @chaoticvibing Twitter Blue Nerd - twitter.com
// @namespace   Violentmonkey Scripts
// @match       *://*.twitter.com/*
// @grant       none
// @version     1.2.0
// @author      @chaoticvibing - GH @busybox11
// @description 11/9/2022, 11:45:28 PM
// @updateURL    https://gist.githubusercontent.com/KelseyDH/7478e6fea882a5a685ededdebf0d51ea/raw/76eedc195d471add755e84c71bf92126908b1629/twitterblue-nerd.js
// @downloadURL  https://gist.githubusercontent.com/KelseyDH/7478e6fea882a5a685ededdebf0d51ea/raw/76eedc195d471add755e84c71bf92126908b1629/twitterblue-nerd.js

KelseyDH

How to Change Open Files Limit on OS X and macOS

This text is the section about OS X Yosemite (which also works for macOS Sierra) from https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/#mac-os-x

The last time i visited this link it was dead (403), so I cloned it here from the latest snapshot in Archive.org's Wayback Machine https://web.archive.org/web/20170523131633/https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/

Mac OS X

To check the current limits on your Mac OS X system, run:

KelseyDH

Setting up a local DNS server with bind on OSX Mavericks

This is really just an approach for locally testing DNS changes, which can easily be done with a HOSTS file if the change involves an IP address, but gets a bit trickier when things like CNAMEs are involved. This is only meant to test locally off a single machine.

1. Install bind using homebrew

   brew install bind

2. Follow the installation steps to start up bind

KelseyDH

#!/usr/bin/env bash

# ~/.osx — http://mths.be/osx

# Ask for the administrator password upfront
sudo -v

# Keep-alive: update existing `sudo` time stamp until `.osx` has finished
while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &

KelseyDH

# app/domain/null_account.rb
class NullAccount

  def id
    raise "You are calling id on an account that doesn't exist. Make sure the user you're working with has accounts first before trying to call them."
  end
  
  def available_balance
    Money.new(available_balance_cents, available_balance_currency)
  end

KelseyDH

class User < ApplicationRecord
  
  def savings_account
    self.accounts.where(savings: true).first || NullAccount.new
  end
  
  def chequing_account
    self.accounts.where(chequing: true).first || NullAccount.new
  end

KelseyDH

# .present?
if user.savings_account.present?
  user.savings_account.available_balance_cents
else
  0
end

# .try
user.try(:savings_account).(:available_balance_cents) || 0

KelseyDH

# E.g. for a banking app where users might not have bank accounts yet.
# Not having accounts could mean lots of code like this:

if user.savings_account.present?
    user.savings_account.available_balance_cents
end

# But with the NullObject pattern I can confidently call:
user.savings_account.available_balance_cents

KelseyDH

# # A Plain Old Ruby Object (poro) with Rails logger support:
class ServiceObject
  def initialize(foo)
    @logger = Logger.new(STDOUT)
    @foo = foo
  end

  def call
    do_something
  end

KelseyDH

require 'thread'

module ThreadSafe
  
  def self.included(base)
    base.extend(ThreadSafeClassMethods)
    base.threadsafe_class_mutex = Mutex.new
  end

  module ThreadSafeClassMethods