Martin Fowler's Ruby examples (http://www.martinfowler.com/bliki/Closure.html), in my proposed Fan syntax:

/////////////////////////////////////////////////////////////////////
// Ruby
/////////////////////////////////////////////////////////////////////

def managers(emps)
  return emps.select {|e| e.isManager}
end

def highPaid(emps)
  threshold = 150
  return emps.select {|e| e.salary > threshold}
end 

def paidMore(amount)
  return Proc.new {|e| e.salary > amount}
end

highPaid = paidMore(150)
john = Employee.new
john.salary = 200
print highPaid.call(john)

/////////////////////////////////////////////////////////////////////
// Fan
/////////////////////////////////////////////////////////////////////

Employee[] managers(Employee[] emps)
{
  return emps.findAll |Employee e->Bool| { return e.isManager }
}

Employee[] highPaid(Employee[] emps)
{
  threshold := 150
  return emps.findAll |Employee e->Bool| { return e.salary > threshold }
}

Method paidMore(Int amount)
{
  return |Employee e->Bool| { return e.salary > amount }
}

highPaid := paidMore(150)
john := Employee.make
john.salary = 200
echo highPaid(john)