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RSpec.configure do |config|
  config.before(:suite) do
    DatabaseCleaner.clean_with(:truncation)
  end

  config.before(:each) do
    DatabaseCleaner.strategy = :transaction
  end

  config.before(:each, js: true) do

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irb --simple-prompt         
>> a = [1,2,3]
=> [1, 2, 3]
>> a.select {|e| e >= 2}
=> [2, 3]
>> a.detect {|e| e >= 2}
=> 2

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require 'active_record'

ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: 'db.sqlite3')

ActiveRecord::Schema.define do
  create_table :users, force: true do |t|
  end
end

class ActiveRecord::Base

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require 'active_record'
require 'minitest/autorun'

ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: 'db.sqlite3')

ActiveRecord::Schema.define do
  create_table :users, force: true do |t|
    t.references :company, index: true
  end

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class DeviseCreateUsers < ActiveRecord::Migration
  def migrate(direction)
    super
    # Create a default user
    User.create!(email: 'admin@example.com', password: 'password', password_confirmation: 'password') if direction == :up
  end

  def change
    create_table(:users) do |t|
      ## Database authenticatable

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require 'minitest/autorun'

BOOLEAN_MAPPINGS = {
  'true' => true,
  'false' => false
}

def typecast_hash_values(hash)
  hash.each do |k, old_value|
    if (new_value = BOOLEAN_MAPPINGS.fetch(old_value, old_value)) != old_value

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/usr/local/opt/rbenv/versions/2.1.0/lib/ruby/2.1.0/bigdecimal/util.rb:18: [BUG] Segmentation fault at 0x00000000000000                                                                            |  ETA: 00:04:13 
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin13.0]

-- Crash Report log information --------------------------------------------
   See Crash Report log file under the one of following:
     * ~/Library/Logs/CrashReporter
     * /Library/Logs/CrashReporter
     * ~/Library/Logs/DiagnosticReports
     * /Library/Logs/DiagnosticReports
   for more details.

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STEP_DECORATORS_MAPPING = {
  step1: Decorator1,
  step2: Decorator2
}

step = :step1

STEP_DECORATORS_MAPPING[step].new(...)

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x = '123'
x[0, x.length] = 'aa' # x.replace('aa')

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RSpec.configure do |config|
  config.before do
    Category.subclasses.each do |c|
      c.instance_variable_set(:@instance, nil)
    end

    Category.instance_variable_set(:@instances, nil)
  end
end