Chi-I Huang chiihuang

#MongoDB - Basics

##Installation The Debian package management tool (i.e. dpkg and apt) ensure package consistency and authenticity by requiring that distributors sign packages with GPG keys. Issue the following command to import the 10gen public GPG Key:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10

Create a /etc/apt/sources.list.d/10gen.list file using the following command.

echo 'deb http://downloads-distro.mongodb.org/repo/debian-sysvinit dist 10gen' | sudo tee /etc/apt/sources.list.d/10gen.list

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Possible solutions

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

	import bisect

	class NFA(object):
	EPSILON = object()
	ANY = object()

	def __init__(self, start_state):
	self.transitions = {}
	self.final_states = set()
	self._start_state = start_state

	# Ubuntu upstart file at /etc/init/yourservice.conf

	pre-start script
	mkdir -p /var/log/yourcompany/
	end script

	respawn
	respawn limit 15 5

	start on runlevel [2345]

	{
	"IAB1": "Arts & Entertainment",
	"IAB1-1": "Books & Literature",
	"IAB1-2": "Celebrity Fan/Gossip",
	"IAB1-3": "Fine Art",
	"IAB1-4": "Humor",
	"IAB1-5": "Movies",
	"IAB1-6": "Music",
	"IAB1-7": "Television",
	"IAB2": "Automotive",

	listen l1
	bind 0.0.0.0:80
	mode tcp
	timeout connect 4000
	timeout client 180000
	timeout server 180000
	server srv1 192.168.1.1:80

	global
	user "nobody"

	#!/bin/bash

	MONGO_DATABASE="your_db_name"
	APP_NAME="your_app_name"

	MONGO_HOST="127.0.0.1"
	MONGO_PORT="27017"
	TIMESTAMP=`date +%F-%H%M`
	MONGODUMP_PATH="/usr/bin/mongodump"
	BACKUPS_DIR="/home/username/backups/$APP_NAME"

	Homebrew - Scala 2.10.4

	Install Tapped version of Scala 2.10.4 (old version)
	> brew install homebrew/versions/scala210

	Unlink version of Scala 2.11 (if installed)
	> brew unlink scala

	Link Tapped version of Scala 2.10.4
	> brew link scala210 --force

	config.json
	reading-image.png