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hash = {a: 23, b: 24, c: 25}
puts hash.values.inject(&:+) == (23+24+25) # >> true

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class ChangeTableName < ActiveRecord::Migration
  def self.up
    rename_table :a_tables, :b_tables
  end

  def self.down
    rename_table :b_tables, :a_tables
  end
end

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class Addindex < ActiveRecord::Migration
  def self.up
    add_index :a_table, :name
  end
end

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class CreateTable < ActiveRecord::Migration
  def self.up
    create_table :a_tables do |t|
      t.column :name1, :integer, :null => false
      t.column :name2, :text,    :null => false
      t.timestamps
    end
  end

  def self.down

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<div class="video-container">
  <iframe src="http://player.vimeo.com/video/78074896" width="500" height="281" frameborder="0"></iframe>
</div>

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body {
  font-size: 18px;
  margin 0 auto;
  
  @media screen and (max-width: 1040px){
    font-size: 16px;
    width: 60%;
  }
    
  @media screen and (max-width: 600px){

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package main

import (
    "encoding/json"
    "fmt"
    "strings"
)

const blob = `[
    {"Title":"0redev", "URL": "http//oredev.org"},

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package main

import (
    "flag"
    "fmt"
    "time"
)

var (
    message = flag.String("message", "Hello!", "What to say")

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Install SQL*Plus

1. Download .rpm package here
   • oracle-instantclinet*-basic-*.rpm
   • oracle-instantclinet*-devel-*.rpm
   • oracle-instantclinet*-sqlplus-*.rpm
2. Install alien (sudo apt-get install alien)
3. Convert the rpm files and install
   • sudo alien -i oracle-instantclinet*-basic-*.rpm

• sudo alien -i oracle-instantclinet*-devel-*.rpm

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def function(*args)
  puts args.join(",")
end

function("a","b","c")

# >> a,b,c