Samda

http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

#payload: [{"kind"=>"person"}]
Segment.where("payload @> ?", [{kind: "person"}].to_json)

#data: {"interest"=>["music", "movies", "programming"]}
Segment.where("data @> ?",  {"interest": ["music", "movies", "programming"]}.to_json)
Segment.where("data #>> '{interest, 1}' = 'movies' ")
Segment.where("jsonb_array_length(data->'interest') > 1")

Samda

Deploying a subfolder to GitHub Pages

Sometimes you want to have a subdirectory on the master branch be the root directory of a repository’s gh-pages branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master branch alongside the rest of your code.

For the sake of this example, let’s pretend the subfolder containing your site is named dist.

Step 1

Remove the dist directory from the project’s .gitignore file (it’s ignored by default by Yeoman).

Samda

# Load DSL and Setup Up Stages
require 'capistrano/setup'

# Includes default deployment tasks
require 'capistrano/deploy'

# Rails (includes bundler, rails/assets and rails/migrations)
require 'capistrano/rails'

# Whenever

Samda

byte-size tuts

by alexander white ©

golang tutorials

• 0 - installation on a Mac
• 1 - packages
• 2 - remote packages
• 3 - variable syntax
• 4 - functions syntax
• 5 - loops syntax

Samda

require 'mina/bundler'
require 'mina/rails'
require 'mina/git'
require 'mina/rvm'

# Usually mina focuses on deploying to one host and the deploy options are therefore simple.
# In our case, there is a number of possible servers to deploy to, it is therefore necessary to
# specify the host that we are targeting.
server = ENV['server']
# Since the same host can have multiple applications running in parallel, it is necessary to

Samda

gem 'will_paginate'

Samda

require 'mina/bundler'
require 'mina/rails'
require 'mina/git'
require 'mina/rbenv'  # for rbenv support. (http://rbenv.org)
# require 'mina/rvm'    # for rvm support. (http://rvm.io)

# Basic settings:
#   domain       - The hostname to SSH to.
#   deploy_to    - Path to deploy into.
#   repository   - Git repo to clone from. (needed by mina/git)

Samda

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE busconfig PUBLIC
    "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
    "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
    <!-- Only the root user can own the Upstart name -->
    <policy user="root">
        <allow own="com.ubuntu.Upstart" />
    </policy>

Samda

# Title 
Arduino Powered Burglar Alarm
# Picture 
media: http://www.deviantsart.com/3099afr.jpg
# Objective
Nigeria is a very hot place. Temperature averages 30 degree Celsius and even at Night the temperature is hot. The aim of this project is to regulate temperature by turning on the fan whenever the temperature reaches a certain level and turn it off whenever the temperature drops.  This helps to conserve energy and also to improve comfort for the owner.
# Duration
40min
# Age Group
all

Samda

# Title 
AIR QUALITY STATION
# Picture 
media: http://s27.postimg.org/n9159lwpf/1604581_626258354094217_2010345751_n.jpg
# Objective
the main Objective of this project is to measure pollution percentage in the air specially carbon monoxide in cities and for industrial applications. we tend to make it like as a distributed stations around the world to make a map for the pollution in the world.
# Duration
3 days
# Age Group
all