nthj

# Expirable is a module that lets you easily cache
# groups of records, either across an entire record:
#   cache(Snippet) => cache(Snippet.cache_key)
# or, across a scope:
#   cache(page.blocks) => cache(page.blocks.cache_key)
#
# Why not just use `maximum(:updated_at)`?
# Because it requires 2 queries: the total count,
# and the updated_at timestamp

nthj

/**
 * Definition for singly-linked list.
 * type ListNode struct {
 *     Val int
 *     Next *ListNode
 * }
 * Runtime: 8 ms, faster than 88.19% of Go online submissions for Add Two Numbers.
 * Memory Usage: 4.3 MB, less than 100.00% of Go online submissions for Add Two Numbers.
 */
var one = ListNode{ Val: 1 }

nthj

# This isn't mine
# I can't remember where I found it, but mad props to whoever created it

class Hash
  def filter
    result = self.map do |k, v|
      r = yield v
      [k, r]
    end
    Hash[*result.flatten]

nthj

console: bundle exec rails console
rake: bundle exec rake
web: daemonized-worker & web
worker: worker

nthj

# setup
RAILS_VERSION="5.1.1"

gem install rails -v $RAILS_VERSION && \
  rails _${RAILS_VERSION}_ new rails-${RAILS_VERSION}-test && \
  cd rails-${RAILS_VERSION}-test && \
  rails generate model User && \
  rails db:migrate && \
  echo 'class User < ActiveRecord::Base; FOO = where(id: [1]); end' > app/models/user.rb && \
  echo 'Rails.application.routes.draw { User }' > config/routes.rb

nthj

# Say you want to look up the attrs of a Stripe Event for logging to your internal database.
  attrs = begin
            retriable(Stripe::APIConnectionError, Stripe::APIError, max: 25) do
              # ... retrieve attrs from the Stripe event here...
            end
          rescue Stripe::APIConnectionError, Stripe::APIError
            # We're inside an SQS queue block
            throw :skip_delete # we'll just have to wait on this event, come back later
          rescue Stripe::Error
            notify $!

nthj

-- user_workspaces_v01
-- Pull Organizations and Workspaces affiliated with, 
-- and also organizations we have projects we are collaborating on 

-- first version :: ugly and super slow, see updated version next

  WITH user_workspaces AS (
        SELECT a.user_id, 
               o.name
          FROM user_affiliations a

nthj

bundler:      bundle exec guard --plugin bundler --no-interactions
db:           postgres -D /opt/boxen/homebrew/var/postgres
integration:  bundle exec guard --plugin cucumber --no-interactions
mailcatcher:  mailcatcher --foreground --verbose
redis:        redis-server /opt/boxen/homebrew/etc/redis.conf
test:         bundle exec guard --plugin rspec --no-interactions
web:          bundle exec guard --plugin unicorn --no-interactions
worker:       bundle exec sidekiq

nthj

@mixin blur($much: 10px) {
  -webkit-filter: blur($much);
  
  // Force hardware acceleration for vastly improved performance   
  -webkit-transform: translate3d(0, 0, 0);
} 

nthj

# Quiz Exercise, Part One
#
# Quiz for a list of names & birthdays,
# then list out their ages
#
# For example:
#
#   Hey there! Please enter a list of names:
#   > John, Sam, Bob, Alisha, Henry
#