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* Acerca de Git
  - ¿Por que es necesario?
  - Otras opciones en control de versiones
  - Distribuidos y centralizados

* Recursos
  - Pro Git book. http://git-scm.com/book
  - StackOverflow
  - Internet

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def solution(a)
  ((( a.size + 2 ) * ( a.size + 1 )) / 2) - ( a.reduce(&:+) || 0 )
end

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# Missing int from unsorted array and with arbitrary starting int

def solution(a=[])
  sum = 0
  min = a.first
  max = a.last

  a.each do |e|
    sum += e
    min = e if e < min

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# http://stackoverflow.com/questions/28711074/undefined-method-error-for-scope-on-sti-subclass

unless File.exist?('Gemfile')
File.write('Gemfile', <<-GEMFILE)
source 'https://rubygems.org'
gem 'rails'
gem 'arel'
gem 'sqlite3'
GEMFILE

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unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'rails', '4.2.0'
    gem 'arel'
    gem 'sqlite3'
  GEMFILE

  system 'bundle'
end

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#/etc/udev/rules.d/99-displaymagic.rules
# enable LVDS on HDMI disconnect
SUBSYSTEM=="drm", ACTION=="change", RUN+="/usr/local/bin/displaymagic.sh"

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\pset null 'NULL'
\set HISTFILE ~/.psql_history- :HOST - :DBNAME
\set HISTSIZE 100000
\timing
\set PROMPT1 '(%n@%M:%>) [%/] > '
\set PROMPT2 ''
\encoding unicode
\timing
\pset pager always
\setenv LESS '-iMSsx2 -FX'

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before_filter :find_position, only: [:show, :destroy, :edit]

  def destroy
    if @position.destroy
      flash[:success] = t('labels.success')
    else
      flash[:error] = t('labels.error')
    end
    redirect_to positions_path
  end

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ctags -aR --languages=-javascript app

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%s/\(:\)\(\S\+\)\s\+=>/\2:/