OpenEuphoria

Split & Split_Match

• Posted by Ralf Nieuwenhuijsen <nieuwen at XS4ALL.NL> Sep 07, 1998
• 462 views

I had these laying around.
They are that usefull for real preproccesing.. but for converting a one
dimensional sequence (with end marks) to a 2-dimensional sequence is easily
done.

So, just in case anybody has a use for them:

-- Split & Split_Match by Ralf Nieuwenhuijsen (nieuwen at xs4all.nl)
-- Use NiceForm /d splits.e to get some documentation
-- By using this code or reading any furhter, you agree to the terms that
-- are available by email at a cost of 13034230493433 US. $

function split (object x, sequence s)
  --/ Usage: s = split (delimiter, sequence)
  --/ The sequence (second arg) will be divided in pieces by the delimiter
  --/ The delimiter object is compared agains every element of the sequence
  --/ All pieces are returned in one sequence

  sequence ret
  integer pos, prev

  ret = {}
  prev = 1
  pos = find (x,s)
  while pos do
    ret = append(ret, s[prev..pos])
    prev = pos + 1
    pos = find(x, s[prev..length(s)])
  end while

  return append(ret, s[prev..length(s)])
end function

function split_match (object x, sequence s)
  --/ Usage: s = split_match (delimiter, sequence)
  --/ The sequence (second arg) will be divided in pieces by the delimiter
  --/ The delimiter object is matched against any section of the sequence
  --/ All pieces are returned in one sequence

  sequence ret
  integer pos, prev

  ret = {}
  prev = 1
  if atom(x) then x = {x} end if
  pos = match (x,s)
  while pos do
    ret = append(ret, s[prev..pos])
    prev = pos + length(x)
    pos = find(x, s[prev..length(s)])
  end while

  return append(ret, s[prev..length(s)])
end function