anchor.diff:  }
   ----
   
  -== Col
  +== Creating arrays with `col` function
   
   The `col` function is used to move a column of numbers from a list of tuples into an `array`.
   This is an important function because Streaming Expressions such as `sql`, `random` and `timeseries` return tuples,
  
positive.code: }
  ----
  
  == List
  
  Next we have the *list* data structure.
  
  
negative.code: ----
  
  
  == Tuples
  
  The *tuple* is the next data structure we'll explore.
  
  