Damien Wilson 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#<=>.

Links

Pros

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@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)

	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]

	# 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

	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'

	# 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.
	#

	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

	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