def index
    params[:view] = 'grid' unless params[:view].present?

    @all_coasters = Coaster.all
    @coasters = @all_coasters

    if params[:letter]
      @coasters = Coaster.where("name LIKE ?", params[:letter] + '%')
    else
      @coasters = Coaster.where("name LIKE ?", 'A' + '%')
    end

    if params[:letter] == '#'
      @coasters = Coaster.all().select { |r| /^[0-9].*/ =~ r.name }
    end

    if params[:letter] == 'all'
      @coasters = @all_coasters
    end

    send("#{params[:view]}")

    Coaster.include_root_in_json = false
  end

  def grid
    params[:view] = 'grid'
    render :index
  end

  def worldmap
    params[:view] = 'worldmap'
    render :index
  end

  def table
    params[:view] = 'table'
    render :index
  end