Revath S Kumar revathskumar

Python Number Conversion Chart

From	To	Expression

Responsive Elements

Responsive Elements is a proposal to extend the functionality of Media Queries to apply to Elements, allowing individual Elements to respond to local changes. Like existing Media Queries, these element media queries would consist of at least one expression that limits the scope of the selector; such as width, height, and aspect ratio.

Syntax

[selector]:media([query]) { [declarations] }

Examples

Security Best Practices

Force SSL for Rails
Switch to encrypted_cookie_store
Set session expire_after to 10 minutes
Make sure that protect_from_forgery is set.
Make sure passenger & nginx runs as nobody or a less privileged user.
Double check uploads to make sure it is handling relative paths
Use attr_accessible where it makes sense
Filter all sensitive info from from logs

My rails App boilerplate

Create Rails APP

  rails new blog -Td mysql --skip-bundle

Create .rvmrc

echo "rvm use 1.9.3-p194" >> .rvmrc

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

Learn you a Haskell - In a nutshell

This is a summary of the "Learn You A Haskell" online book under http://learnyouahaskell.com/chapters.

1. Introduction

Haskell is a functional programming language.

	sudo add-apt-repository ppa:pitti/postgresql
	sudo apt-get update
	sudo apt-get install postgresql-9.2 postgresql-server-dev-9.2 postgresql-contrib-9.2

	sudo su -l postgres
	psql -d template1 -p 5433
	CREATE EXTENSION IF NOT EXISTS hstore;
	CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
	service postgresql stop
	/usr/lib/postgresql/9.2/bin/pg_upgrade -b /usr/lib/postgresql/9.1/bin -B /usr/lib/postgresql/9.2/bin -d /var/lib/postgresql/9.1/main/ -D /var/lib/postgresql/9.2/main/ -O "-c config_file=/etc/postgresql/9.2/main/postgresql.conf" -o "-c config_file=/etc/postgresql/9.1/main/postgresql.conf"

	/*
	Grep.js
	Author : Nic da Costa ( @nic_daCosta )
	Created : 2012/11/14
	Version : 0.2
	(c) Nic da Costa
	License : MIT, GPL licenses

	Overview:
	Basic function that searches / filters any object or function and returns matched properties.

	#!/usr/bin/env ruby
	$: << File.dirname(__FILE__)

	require 'rubygems'
	require 'eventmachine'
	require 'em-http' # gem name em-http-request
	require 'yajl'
	require 'yajl/json_gem'

	class Streamer

	# SSL self signed localhost for rails start to finish, no red warnings.

	# 1) Create your private key (any password will do, we remove it below)

	$ openssl genrsa -des3 -out server.orig.key 2048


	# 2) Remove the password

	$ openssl rsa -in server.orig.key -out server.key