damien

damien@Apollonius ~/workspace/Cataclysm-DDA [dinomod-subtree]
± % git log --oneline --decorate -- data/mods/DinoMod | wc -l
54

damien@Apollonius ~/workspace/Cataclysm-DDA [dinomod-subtree]
± % git log --oneline --decorate -- data/mods/DinoMod | cat
2b43ec698b (HEAD -> dinomod-subtree, origin/dinomod-subtree) Add 'data/mods/DinoMod/' from commit '0d385a83106bec4a9fc73d5576fe5b61974d0db9'
bfa16029be Prepare DinoMod for git subtree inclusion
5d76bd145b Aftershock and dinomod monsters name to object (#38963)
47499c5055 Change maintainer of DinoMod to @damien (#37490)

damien

Date and Time comparisons in ActiveSupport

Question: How do we safely compare a date to an unknown value within a Rails application? Example: params[:date_field] > 2.years.ago

Doing a bit of digging, it looks like 2.years.ago returns an instance of ActiveSupport::TimeWithZone. In ruby, whenever you do a comparison of any sort ruby will follow the rules outlined in the Comparable module of stdlib.

ActiveSupport::TimeWithZone will create a instance of Time in a UTC time zone when doing comparisons with ActiveSupport::TimeWithZone#<=>.

damien

module Recurse
  # Iterate over obj and all of it's values, copying them into a flat array
  # @return [Array]
  # @example Flattening a nested hash
  #   { foo: { bar: { fizz: 'buzz' } } }.flatten_recursively
  #   # => [:foo, :bar, :fizz, "buzz"]
  #
  # @example Flattening an array of mixed objects
  #  [{ fizz: :buzz }, { foo: :bar }, [1, [2, 3]]].flatten_recursively
  #  # => [:fizz, :buzz, :foo, :bar, 1, 2, 3]

damien

# Functional implementation of the Sieve of Eratosthenes
#
# Once initialized, an instance of this class may be used to generate an
# infinite number of primes.
#
# @see https://www.cs.hmc.edu/~oneill/papers/Sieve-JFP.pdf
# @see http://raganwald.com/2013/02/23/sieve.html
#
# Example:
#   @sieve = EratosthenesIncrementalSieve.new

damien

logger = ActiveSupport::Logger.new(STDOUT)
logger.formatter = -> (severity, datetime, progname, msg) { format('[%-5.5{severity} %{timestamp}] %{msg}', severity: severity, timestamp: datetime.to_s(:db), msg: msg) + "\n" }

logger.unknown 'foo'
logger.fatal 'bar'
logger.error 'fizz'
logger.warn 'buzz'
logger.info 'alice'
logger.debug 'bob'

damien

# A parser for course code strings
#
# Course codes are unique identifiers used to identify particular classes instructed at an edicuational institution.
#
# There isn't any real standard for course codes, but the examples below demonstrate common formats for course codes
# in the places where this parser is used.
#
# The parser itself is generated using [Treetop](https://github.com/nathansobo/treetop), so look there if you're interested
# in the underlying framework that generates the CourseCodeParser class when we load up our parser grammar.
#

damien

Links

• Why should I NOT use ElasticSearch as my primary datastore?
• Log Aggregation with Fluentd, ElasticSearch, and Kibana
• Chewy

Pros

damien

Locking down s3 with IAM

AWS Identiy and Access Manager: http://aws.amazon.com/iam/

• http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
• http://docs.aws.amazon.com/AmazonS3/latest/dev/walkthrough1.html
• For data we don’t want accidentally deleted or overwritten within s3, we should enable bucket versioning:
  • http://stackoverflow.com/questions/10592541/amazon-s3-acl-for-read-only-and-write-once-access
• http://docs.aws.amazon.com/AmazonS3/latest/dev/Versioning.html

damien

class TeamMembership < ActiveRecord::Base
  # A proc that will enqueue `NotificationMailer.team_invitation`
  DEFAULT_NOTIFIER = proc do |user, team|
    NotificationMailer.team_invitation(team, user).deliver_later
  end

  class << self
    # This is a class level attribute that is mainly used for testing.
    # Defaults to {TeamMembership::DEFAULT_NOTIFIER}
    attr_accessor :notifier

damien

class SearchController < ApplicationController
  def index
    if search_params.blank? && where_params.blank?
      @portfolios = Portfolio
        .includes([:user, :portrait])
        .where(published: true)
        .order('created_at DESC')

    else
      @portfolios = search_portfolio search_params, where_params