Kevin Tran duykhoa

Puppet Cheat Sheet

Validate manifests

Puppet Lint

http://puppet-lint.com/

Installing of Fedora:

Chapter 1 - Object Oriented Design

The purpose of design is to allow you to do design later, and it's primary goal is to reduce the cost of change.

SOLID Design:

Single Responsibility Principle: a class should have only a single responsibility
Open-Closed Principle: Software entities should be open for extension, but closed for modification (inherit instead of modifying existing classes).
Liskov Substitution: Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
Interface Segregation: Many client-specific interfaces are better than one general-purpose interface.

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

UPDATE a fork of this gist has been used as a starting point for a community-maintained "awesome" list: machine-learning-with-ruby Please look here for the most up-to-date info!

Resources for Machine Learning in Ruby

Gems

liblinear-ruby: Ruby interface to LIBLINEAR using SWIG

RedDotRubyConf 2015 links & resources

📆 June 4-5, 2015

🌏 Web site: http://reddotrubyconf.com/ Twitter: http://twitter.com/reddotrubyconf

💁 Ping me @cheeaun on Twitter if you found some awesome stuff for #rdrc2015. This gist will be updated whenever there's new stuff.

🕙 Previously, on RedDotRubyConf...

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FrontEnd Masters - ES6 notes
Rest Parameters

Get Git log in JSON format

git log --pretty=format:'{%n  "commit": "%H",%n  "abbreviated_commit": "%h",%n  "tree": "%T",%n  "abbreviated_tree": "%t",%n  "parent": "%P",%n  "abbreviated_parent": "%p",%n  "refs": "%D",%n  "encoding": "%e",%n  "subject": "%s",%n  "sanitized_subject_line": "%f",%n  "body": "%b",%n  "commit_notes": "%N",%n  "verification_flag": "%G?",%n  "signer": "%GS",%n  "signer_key": "%GK",%n  "author": {%n    "name": "%aN",%n    "email": "%aE",%n    "date": "%aD"%n  },%n  "commiter": {%n    "name": "%cN",%n    "email": "%cE",%n    "date": "%cD"%n  }%n},'

The only information that aren't fetched are:

%B: raw body (unwrapped subject and body)
%GG: raw verification message from GPG for a signed commit

	#!/bin/bash

	### USAGE
	###
	### ./ElasticSearch.sh 1.7 will install Elasticsearch 1.7
	### ./ElasticSearch.sh will fail because no version was specified (exit code 1)
	###
	### CLI options Contributed by @janpieper
	### Check http://www.elasticsearch.org/download/ for latest version of ElasticSearch

	// This works on all devices/browsers, and uses IndexedDBShim as a final fallback
	var indexedDB = window.indexedDB \|\| window.mozIndexedDB \|\| window.webkitIndexedDB \|\| window.msIndexedDB \|\| window.shimIndexedDB;

	// Open (or create) the database
	var open = indexedDB.open("MyDatabase", 1);

	// Create the schema
	open.onupgradeneeded = function() {
	var db = open.result;
	var store = db.createObjectStore("MyObjectStore", {keyPath: "id"});

	# Assumes the database container is named 'db'

	DOCKER_DB_NAME="$(docker-compose ps -q db)"
	DB_HOSTNAME=db
	DB_USER=postgres
	LOCAL_DUMP_PATH="path/to/local.dump"

	docker-compose up -d db
	docker exec -i "${DOCKER_DB_NAME}" pg_restore -C --clean --no-acl --no-owner -U "${DB_USER}" -d "${DB_HOSTNAME}" < "${LOCAL_DUMP_PATH}"
	docker-compose stop db