Command: find_from
  
Syntax: 
  i = find_from(x, s, f)
  
Description: 
  Find x as an element of s started from f. If successful,
  return the index of the first element of s that matches.
  If unsuccessful return 0. 
  
Example 1: 
   location = find_from(11, {5, 8, 11, 2, 3}, 2)
      -- location is set to 3
 
Example 2: 
   names = {"fred", "rob", "george", "mary", ""}
      location = find_from("mary", names, 3)
      -- location is set to 4

See Also: 
  match_from
  
