Command: match
  
Syntax: 
  i = match_from(s1, s2, i)
  
Description: 
  Try to match s1 against some slice of s2 starting from position i.
  If successful,
       return the element number of s2 where the (first) matching slice begins, 
  else return 0. 
  
Example: 
     location = match("pho", "Euphoria",5)
      -- location is set to 0

See Also: 
  find, compare, wildcard_match
  
