mattlong

#!/bin/bash

parents_of_dead_kids=$(ps -ef | grep [d]efunct | awk '{print $3}' | sort | uniq | egrep -v '^1$'); echo "$parents_of_dead_kids" | xargs kill

mattlong

Rails dirty

After modifying an object and after saving to the database, or within after_save:

Rails <= 5	Rails >= 5.1
attribute_changed?	saved_change_to_attribute?
changed?	saved_changes?
changes	saved_changes
attribute_was	attribute_before_last_save

mattlong

# If you get "Inappropriate ioctl for device" when decrypting
# Thanks to https://github.com/keybase/keybase-issues/issues/2798
export GPG_TTY=$(tty)

mattlong

#!/bin/bash

sudo kextunload /System/Library/Extensions/AppleHDA.kext
sudo kextload /System/Library/Extensions/AppleHDA.kext

mattlong

def real_csrf_token(token)
  Base64.strict_decode64(token)
end
      
def xor_byte_strings(s1, s2)
  s2_bytes = s2.bytes
  s1.each_byte.with_index { |c1, i| s2_bytes[i] ^= c1 }
  s2_bytes.pack("C*")
end

mattlong

# [amplitude.com]
amplitude.com
amplify.amplitude.com
analytics.amplitude.com
api.amplitude.com
cdn.amplitude.com
discourse.amplitude.com
events.amplitude.com
go.amplitude.com
info.amplitude.com

mattlong

ruby '2.7.1'

gem 'rails', github: 'rails/rails'
gem 'tzinfo-data', '>= 1.2016.7'  # Don't rely on OSX/Linux timezone data

# Action Text
gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra'
gem 'okra', github: 'basecamp/okra'

# Drivers

mattlong

# Here's a contrived example of a LEFT JOIN using ARel. This is an example of
# the mechanics, not a real-world use case.

# NOTE: In the gist comments, @ozydingo linked their general-purpose ActiveRecord
# extension that works for any named association. That's what I really wanted!
# Go use that! Go: https://gist.github.com/ozydingo/70de96ad57ab69003446

# == DEFINITIONS
# - A Taxi is a car for hire. A taxi has_many :passengers.
# - A Passenger records one person riding in one taxi one time. It belongs_to :taxi.

mattlong

module ActiveRecordExtension
  extend ActiveSupport::Concern

  module ClassMethods
    # Simple left join taking advantage of existing Rails & Arel code
    def left_joins(*args)
      inner_joins = self.joins(*args).arel.join_sources
      left_joins = inner_joins.map do |join|
        Arel::Nodes::OuterJoin.new(join.left, join.right)
      end

mattlong

See question on stack overflow: http://stackoverflow.com/questions/28595636/rails-4-how-to-give-alias-names-to-includes-and-joins-in-active-record-que

- Model Student and model Teacher are both STI models with super class model User
- Model Story is a STI model with super class model Task
- includes() and joins(), both fails

Rails alias naming convention (includes() and joins())

- One model as parameter
  - is base model (includes(:users))