what is in an empty textbox?

[Mark Tarver]

I recently created an empty textbox and wanted to find what TCL
thought was in it.
I used these commands

% text .t
% pack .t
% .t get 1.0 end
% set x [.t get 1.0 end]

% puts [string length $x]
1

What is in x exactly?

Mark

[Arjen Markus]

The end-of-line character that marks the end-of-text.

Regards,

Arjen

[suchenwi]

On 16 Mai, 12:51, Arjen Markus <arjen.mar...@wldelft.nl> wrote:
> On 16 mei, 12:32, Mark Tarver <dr.mtar...@ukonline.co.uk> wrote:
>
> > I recently created an empty textbox and wanted to find what TCL
> > thought was in it.
> > I used these commands
>
> > % text .t
> > % pack .t
> > % .t get 1.0 end
> > % set x [.t get 1.0 end]
>
> > % puts [string length $x]
> > 1
>
> > What is in x exactly?
>

> The end-of-line character that marks the end-of-text.

You can check for yourself:
% pack [text .t]
(6247) 2 % set it [.t get 1.0 end]

(6247) 4 % format %02x [scan $it %c]
0a
(6247) 5 %
and \x0A is ASCII LF = \n

[Jonathan Bromley]

On 16 May 2007 03:32:32 -0700, Mark Tarver <dr.mt...@ukonline.co.uk>
wrote:

The trailing newline that ALWAYS exists at the end of the
contents of any textbox, try as you might to get rid of it.

I'm sure there is a perfectly good reason for this, but
I have to confess that I find it to be an accursed nuisance.

It's easy to deal with it when you know it's there...

set x [.t get 1.0 end-1c]
--
Jonathan Bromley, Consultant

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The contents of this message may contain personal views which
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[Uwe Klein]

text .t
pack .t
.t get 1.0 end

set x [.t get 1.0 end]

puts [string length $x]

binary scan $x H* hex
puts $hex

-->
1
0a

uwe