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From: Arnold Snarb on 28 Apr 2010 18:50
Binome asked:
>
> I'd like to delete spaces from a string.

No, you don't.


> I have 2 strings "111" and "111", I use concat to get "111 111"
> and now I want to get "111111".

In that case, you shouldn't have used [concat] in the first place.


> Does someone know what instruction I need?

Not really, but I have a few guesses:

* If you have "111" and "111" and want "111111",
==> then just say "111111" in the first place!

* If you have two arbitrary strings $a and $b (which
might be, but are not necessarily, "111" and "111")
and want to jam them together without any spaces in between,
==> then say [set c "$a$b"]. $c will have the answer.

* If you have an arbitrary number of strings
and you want to jam them together without any spaces in between
==> then say [join $listOfStrings ""]

* If you have something other than the above,
and you want something other than the above,
==> then think about your problem some more and ask again.


--Arnold
From: Prof Craver on 29 Apr 2010 00:15
On Apr 28, 11:39 am, Jeff Godfrey <jeff_godf...(a)pobox.com> wrote:

> string map {" " ""} "this    is   my      string"
> returns --> thisismystring

One can also use {join "this is my string" ""},
exploiting the fact that Tcl's list implementation tidies up
many whitespace issues automatically.

And to think, half the online stores in the world still can't
handle spaces in a credit card number.
From: Donal K. Fellows on 29 Apr 2010 04:16
On 29 Apr, 05:15, Prof Craver <xcottcra...(a)gmail.com> wrote:
> On Apr 28, 11:39 am, Jeff Godfrey <jeff_godf...(a)pobox.com> wrote:
> > string map {" " ""} "this    is   my      string"
> > returns --> thisismystring
>
> One can also use {join "this    is   my      string" ""},
> exploiting the fact that Tcl's list implementation tidies up
> many whitespace issues automatically.

That will only work on values that are well-formed lists. The version
with [string map] handles any string.

Donal.
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