This is example one for the interpretation chapter in the article "Trusted Data"

trusted_data_interpretation_example_1.js

var milk      = require('milk');
var customer  = require('customer');
var store     = require('grocery-store');    

if(store.gotEggs()){

  // Buy 12 gallons
  customer
    .buy()
    .product(milk)
    .quantity(12)
    .unit('gallon');

} else {

  // By one gallon
  customer
    .buy()
    .product(milk)
    .quantity(1)
    .unit('gallon');

}