'===========================================================================
' Subject: SPACE TRIMMING                    Date: 04-20-00 (21:22)       
' Author:  Hermann Seegert                   Code: PB                     
' Origin:  hermann.seegert@t-online.de     Packet: PB.ABC
'===========================================================================
 $if 0
                                           Detmold, Germany 19.4.2000

                          ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿Ü
                          ³ Hi everyone! ³Û
                          ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙÛ
                          ßßßßßßßßßßßßßßßßß

   Possibly you know this problem: You want to trim a string, so that
   there  is  only ONE space between the words, but you don't want to
   dropp  the  left  margin. Well, I know, that my solution isn't the
   very best, because it can be programed with pointers, but it still
   does it's work.

                       Comments can be sent to:
                     hermann.seegert@t-online.de
                Programmed in PowerBASIC, Version 3.2
 $endif
 '--- Demo code begins....
 cls
 ? "Code is trimming spaces between words to one space left. Margines are"
 ? "untouched!"
 text$="            Hermann     Seegert's     solution for trimming   spaces"
 write text$
 call treatingspaces(text$)
 write text$
 end
 '--- Demo code ends....
 '
 '---------------------- treatement of spaces -----------------------
 '
sub treatingspaces(text$)
  local x,a,z$,help$
  for x=1 to len(text$)                      'counting left margine spaces
    z$=mid$(text$,x,1)
    if z$<>chr$(32) then decr x,2 : exit for 'first sign<>space
  next x
  if x=-1 then                               'no margine?
    help$=text$
  else                                       'there is a margine
    help$=mid$(text$,1+x)
  end if
  for a=tally(help$,chr$(32)) to 1 step -1   'if there are more spaces bet-
    replace space$(a) with chr$(32) in help$ 'ween two words: there's only
  next a                                     'one left
  if x=-1 then
    text$=help$
  else
    text$=string$(x,32)+help$                'ceeping left margine!
  end if
end sub
 '
 '******************************** EOF ******************************