content: set rec to {name:"Bob", full_name:"Bob Smith", age:24, married:true, income:55000}
  --> {name:"Bob", full_name:"Bob Smith", age:24, married:true, income:55000}
  # set rec to {full name :"Bob Smith"} # error
  
  class of rec
  --> record
  
  length of rec
  count rec
  --> 4
  
  name of rec
  --> "Bob"
  # properties of rec # error
  
  set name of rec to "John"
  --> "John"
  
  {model:"Focus", year:2008} & {maker:"Ford"}
  --> {model:"Focus", year:2008, maker:"Ford"}
  
  {model:"Focus", year:2008, maker:"Ford"} = {year:2008, maker:"Ford", model:"Focus"}
  --> true
  
  {year:2008, model:"Focus", maker:"Ford"} contains {model:"Focus"}
  --> true
  {year:2004} is in {year:2008, maker:"Ford", model:"Focus"}
  --> false
  
  
  