dineshsprabu

Ref: https://docs.docker.com/opensource/project/set-up-dev-env/#task-3-make-a-code-change

Connecting to an existing setup:
  Start virtual machine
    docker-machine start dp-vm

  Check docker machine status
    docker-machine status dp-vm

  Change directory to moby

dineshsprabu

unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'activerecord', '4.2.8'
    gem 'mysql2', '0.4.5'
    gem 'byebug'
  GEMFILE

  system 'bundle install'
end

dineshsprabu

function makeRequest (opts) {
  return new Promise(function (resolve, reject) {
    var xhr = new XMLHttpRequest();
    xhr.open(opts.method, opts.url);
    xhr.onload = function () {
      if (this.status >= 200 && this.status < 300) {
        resolve(xhr.response);
      } else {
        reject({
          status: this.status,

dineshsprabu

Golang 'range' method returns 2 values (index, value)

package main

import (
"fmt"
)

func main(){

dineshsprabu

New Rails app with Mysql in Docker

Create a Gemfile with content

source 'source 'https://rubygems.org'
gem 'rails', '4.2.7.1'

Create an empty file 'Gemfile.lock'

dineshsprabu

version: '2'
services:
  db:
    image: mysql:5.7
    restart: always
    environment:
      MYSQL_USER: root
      MYSQL_PASSWORD: ''
      MYSQL_DATABASE: 'noteapp_development'
    ports:

dineshsprabu

SSH to docker-machine with 'docker-machine ssh <machine-name>' 
Run below commands for installing docker-compose.
  curl -L https://github.com/docker/compose/releases/download/1.11.2/docker-compose-`uname -s`-`uname -m` > ./docker-compose
  sudo mv ./docker-compose /usr/bin/docker-compose
  sudo chmod +x /usr/bin/docker-compose

dineshsprabu

Downloading and installing.
  curl -L https://github.com/docker/machine/releases/download/v0.10.0/docker-machine-`uname -s`-`uname -m` >/usr/local/bin/docker-machine && chmod +x /usr/local/bin/docker-machine

Adding VBox dependency
  brew cask install virtualbox

Creating a new machine. 'default' would be the name of the machine.
  docker-machine create --driver default

Listing the machines.

dineshsprabu

1) add gem                                                                                          
2) create vendor directory, and download script                                                     
3) configure application.rb                                                                         
4) write js that points the trigger to the displayer                                                
5) ensure the trigger has the correct jquery selector                                               
6) ensure the displayer has the correct jquery selector  

1) add gem 
gem 'rack-pjax'

dineshsprabu

require 'oauth2'

# on the initial action.
# Get the client_id and client_secret for your app from
# from the developer console of the app to be authenticated.
client = OAuth2::Client.new('client_id', 'client_secret', :authorize_url => '/o/oauth2/auth' ,:site =>'https://accounts.google.com')

# The redirect uri is the endpoint on our app which can
# take the code/access_token sent for further access.
a_url = client.auth_code.authorize_url(:redirect_uri => 'http://localhost:8080/oauth2/callback')