forum.vdsworld.com Forum Index forum.vdsworld.com
Visit VDSWORLD.com
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 


String manipulation - Trimleft & Trimright

 
Post new topic   Reply to topic    forum.vdsworld.com Forum Index -> Visual DialogScript 3 Source Code
View previous topic :: View next topic  
Author Message
Dr. Dread
Professional Member
Professional Member


Joined: 03 Aug 2001
Posts: 1065
Location: Copenhagen, Denmark
PostPosted: Wed Sep 04, 2002 8:04 am    Post subject: String manipulation - Trimleft & Trimright Reply with quote
Just two small routines removing plain whitespace chars (spaces and tabs) from just one side of a string - as opposed
to VDS @trim() which will always do both.

Code:

%%string = "      some string       "
REM You may add in some tabs and spaces to the left and right in the above string
REM Forum just shows a single space

REM ######## Trimleft routine ########
%%outstring = %%string
%%inc = 0
repeat
%%inc = @succ(%%inc)
%%char = @substr(%%string,%%inc,)
  REM Check for spaces and tabs
  if @equal(%%char," ")@equal(%%char,@tab())
    %%outstring = @strdel(%%outstring,1,)
  else
    REM The first time a non-whitespace char is met, we exit the loop
    %%inc = @len(%%string)
  end
until @equal(%%inc,@len(%%string))


REM ######## Trimright routine ########
%%outstring2 = %%string
%%inc = @len(%%string)
repeat
%%char = @substr(%%string,%%inc,)
  REM Check for spaces and tabs
  if @equal(%%char," ")@equal(%%char,@tab())
    %%outstring2 = @strdel(%%outstring2,@len(%%outstring2),)
  else
    REM The first time a non-whitespace char is met, we exit the loop
    %%inc = 1
  end
%%inc = @pred(%%inc)
until @equal(%%inc,0)

info input@TAB()= @CHR(34)%%string@CHR(34)@CR()trimleft@TAB()= @CHR(34)%%outstring@CHR(34)@CR()trimright@TAB()= @CHR(34)%%outstring2@CHR(34)


Greetz
Dr. Dread
_________________
~~ Alcohol and calculus don't mix... Don't drink and derive! ~~

String.DLL * advanced string processing

Last edited by Dr. Dread on Tue Jul 29, 2003 11:30 am; edited 3 times in total
Back to top
View user's profile Send private message
Mac
Professional Member
Professional Member


Joined: 08 Jul 2000
Posts: 1585
Location: Oklahoma USA
PostPosted: Wed Sep 04, 2002 9:15 am    Post subject: Reply with quote
Or ya can do it this way with no other vars...
chr(32) is space, @chr(9) is tab
__________________________________________________________________________________________________________________________
Code:

%s = @chr(9)@chr(32)Test string@chr(32)@chr(9)
INFO String:@cr()@cr()@chr(34)%s@chr(34)

rem -- Remove spaces/tabs from left --
REPEAT
  if @equal(@substr(%s, 1), @chr(9))@equal(@substr(%s, 1), @chr(32))
     %s = @strdel(%s, 1)
  end
UNTIL @both(@not(@equal(@substr(%s, 1), @chr(9))), @not(@equal(@substr(%s, 1), @chr(32))))

INFO Left spaces/tabs removed:@cr()@cr()@chr(34)%s@chr(34)

rem -- Remove spaces/tabs from right --
REPEAT
  if @equal(@substr(%s, @len(%s)), @chr(9))@equal(@substr(%s, @len(%s)), @chr(32))
     %s = @strdel(%s, @len(%s))
  end
UNTIL @both(@not(@equal(@substr(%s, @len(%s)), @chr(9))), @not(@equal(@substr(%s, @len(%s)), @chr(32))))

INFO Right spaces/tabs removed:@cr()@cr()@chr(34)%s@chr(34)

Cheers, Mac
_________________
VDSug.dll does file IO, check/disable menu items,
non-VDS dlls, draw functions and more...
Free download (30k dll size) at:
http://www.vdsworld.com/download.php?id=361
Back to top
View user's profile Send private message Send e-mail
Tommy
Admin Team


Joined: 16 Nov 2002
Posts: 746
Location: The Netherlands
PostPosted: Wed Sep 04, 2002 12:46 pm    Post subject: Reply with quote
Or even like this:

Code:

  %%trim = "  hello  "
  gosub trimleft
  info Left trimmed: @chr(34)%%trim@chr(34)
  %%trim = "  hello  "
  gosub trimright
  info Right trimmed: @chr(34)%%trim@chr(34)
  exit
:trimleft
  %%trim = @substr(@trim(@strins(%%trim,@succ(@len(%%trim)),a)),1,-1)
  exit
:trimright
  %%trim = @strdel(@trim(@strins(%%trim,1,a)),1)
  exit

Back to top
View user's profile Send private message Send e-mail Visit poster's website
Dr. Dread
Professional Member
Professional Member


Joined: 03 Aug 2001
Posts: 1065
Location: Copenhagen, Denmark
PostPosted: Wed Sep 04, 2002 1:10 pm    Post subject: Reply with quote
That's brilliant, Tommy!

So simple and efficient that I should kick my own shin for not thinking of it. Laughing

Oouuch, did it now! Serves me right! Twisted Evil

Greetz
Dread
_________________
~~ Alcohol and calculus don't mix... Don't drink and derive! ~~

String.DLL * advanced string processing
Back to top
View user's profile Send private message
Dr. Dread
Professional Member
Professional Member


Joined: 03 Aug 2001
Posts: 1065
Location: Copenhagen, Denmark
PostPosted: Wed Sep 04, 2002 1:21 pm    Post subject: Reply with quote
And it may be made even simpler Idea

Code:

:trimleft
  %%trim = @substr(@trim(%%trim"X"),1,-1)
  exit
:trimright
  %%trim = @strdel(@trim(X%%trim),1)
  exit



Greetz
Dread
_________________
~~ Alcohol and calculus don't mix... Don't drink and derive! ~~

String.DLL * advanced string processing
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    forum.vdsworld.com Forum Index -> Visual DialogScript 3 Source Code All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum

Twitter@vdsworld       RSS

Powered by phpBB © 2001, 2005 phpBB Group