bf4

What

A technique for writing parsers.

Why

• Easy to understand
• Generally applicable
• Full power of the programming language at your disposal
• Declarative

bf4

Table of contents

• Concepts
• Reads
  • Basic Setup
  • Filtering
  • Custom Filtering
  • Sorting
• Custom Sorting

bf4

module AMS
  module V09
    class Serializer < ActiveModel::Serializer

       def serializable_hash(adapter_options = nil,
                             options = {},
                             adapter_instance = self.class.serialization_adapter_instance)
         object.nil? ? nil : super
       end
    end

bf4

Setup

• http://leiningen.org/ Get the repl
• Set up your ide (vim + fireplace, maybe atom, or be awesome with emacs. I don't use emacs)

Dip your beak

• https://learnxinyminutes.com/docs/clojure/ write this out in the repl to see what the code looks like.

The APIs are thorough and awesome

• https://clojure.org/about/rationale read this all the way through

bf4

/**
NOTE:
Assumes env contains aws credentials:
AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY
AWS_SECRET_KEY_ID or AWS_SECRET_KEY
and AWS_REGION_NAME (e.g. 'US-EAST-1')

see EnvAuth() below
*/

bf4

#!/bin/bash
# dontforget
#
# A stupid script for short term reminders in bash
#
# Arguments just need to contain a number and a bunch of words.
#
# The number can be anywhere in the arguments, but there shouldn't
# be any other numeric digits.
#

bf4

/ In app/views/shared/

#dev-badge
  span= Rails.env
  span It ain't production!

bf4

require 'warden/github'

class SidekiqGithubChecker
  def self.registered(app)
    app.helpers do
      def warden; env['warden'] end
      def github_organization_authenticate!(name)
        unless warden.user.organization_member?(name)
          halt [401, {}, ["You don't have access to organization #{name}"]]
        end

bf4

background

There are many options available for tuning ruby memory management: https://github.com/ruby/ruby/blob/trunk/gc.c#L7420-L7444

The one that gets the most attention is RUBY_GC_HEAP_GROWTH_FACTOR, which is the only one Heroku suggests adjusting: https://devcenter.heroku.com/articles/ruby-memory-use#gc-tuning

I've often wondered what the drawback was for setting RUBY_GC_HEAP_GROWTH_FACTOR quite low for a webapp.

bf4

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

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Index: