area: (x, y, x1, y1) ->
  (x - x1) * (x - y1)

x:  y:  10
x1: y1: 20

puts area(x, y, x1, y1) is 100

puts(area(x, y,
           x1, y1) is 100)

puts(area(
  x
  y
  x1
  y1
) is 100)


# Arguments are turned into arrays.
curried: ->
  puts area.apply(this, arguments.concat(20, 20)) is 100

curried 10, 10


# Arguments is not a special keyword -- it can be assigned to:
func: ->
  arguments: 25
  arguments

puts func(100) is 25


# Arguments can be accessed as a property.
this.arguments: 10
puts @arguments is 10