people = DB.find_customers
orders = Orders.for_customers(people)
tax = sales_tax(orders, 2013)
filing = prepare_filing(tax)
filing = prepare_filing(sales_tax(Orders.for_customers(DB.find_customers), 2013))
filing = DB.find_customers
|> Orders.for_customers
|> sales_tax(2013)
|> prepare_filing
Source: Programming Elixir: Functional |> Concurrent |> Pragmatic |> Fun