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Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

• They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

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pluck_in_batches

Sometimes you need to iterate over a ton of items and you don't want the overhead of creating AR objects out of all of them. Hell, you only need a few things! Well, #pluck has your back.

But what if you want to iterate over many tonnes of items?

Pluck in batches to the rescue!

This fork works on any orderable primary key not just integers just like http://api.rubyonrails.org/classes/ActiveRecord/Batches.html#method-i-find_in_batches

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AWS Elastic Beanstalk deploy user restricted IAM policy

An IAM user policy document to give minimal rights for deploying an Elastic Beanstalk application.

Where:

• REGION: AWS region.
• ACCOUNT_ID: AWS account ID.
• APPLICATION_NAME: Desired target Elastic Beanstalk application name(space).
• IAM_INSTANCE_PROFILE_ROLE: The instance profile (IAM role) Elastic Beanstalk EC2 instaces will run under.

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DELIMITER |

CREATE FUNCTION uuid_from_bin(b BINARY(16))
RETURNS CHAR(36) DETERMINISTIC
BEGIN
  DECLARE hex CHAR(32);
  SET hex = HEX(b);
  RETURN LOWER(CONCAT(LEFT(hex, 8), '-', MID(hex, 9,4), '-', MID(hex, 13,4), '-', MID(hex, 17,4), '-', RIGHT(hex, 12)));
END
|

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#!/bin/bash
#
# The MIT License
#
# Copyright 2014 Jakub Jirutka <[email protected]>.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

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# An example of the below

virtualenv "/home/dvcsmirrors/hg" do
    owner "root"
    group "dvcsmirrors"
    mode 0775
    packages "Mercurial" => "1.6.3",
             "hgsubversion" => "1.1.2"
end

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# Nginx+Unicorn best-practices congifuration guide. Now with SPDY!
# We use latest stable nginx with fresh **openssl**, **zlib** and **pcre** dependencies.
# Some extra handy modules to use: --with-http_stub_status_module --with-http_gzip_static_module
#
# Deployment structure
#
# SERVER:
#  /etc/init.d/nginx                             (1. nginx)
#  /home/app/public_html/app_production/current  (Capistrano directory)
#

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source 'http://rubygems.org'

gem 'sunzi'
gem 'rake'
gem 'fog'

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require 'formula'

class Libstemmer < Formula
  # upstream is constantly changing the tarball,
  # so doing checksum verification here would require
  # constant, rapid updates to this formula.
  head 'http://snowball.tartarus.org/dist/libstemmer_c.tgz'
  homepage 'http://snowball.tartarus.org/'
end