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From: CKL on 12 Mar 2010 16:23
Hello tcl gurus

I'm sure that the question has already been asked a lot of times, but
it's difficult to find the right syntax to find an answer to my
question
So I ask it again


#let following variable.
set a(3) "My variable"

# Now another way
set index "(3)"
set base "a"
set var $base$index
puts $var
a(3)

# What I want is now $a(3) which should give me "My Variable"

puts $$var
$a(3)

Has anybody a solution

Thanks in advance


Christian

From: Prof Craver on 12 Mar 2010 16:42
On Mar 12, 4:23 pm, CKL <christian.klugesh...(a)gmail.com> wrote:
>
>
> # What I want is now $a(3) which should give me "My Variable"
>
> puts $$var
> $a(3)
>
> Has anybody a solution

Try puts [set $var] instead of puts $$var. You could also simply
write
puts [set $base$index]

Note that if you instead {set index 3} instead of {set index (3)}, the
interpreter will barf at you for writing {puts [set $base($index)]};
you must instead write {puts [set ${base}($index)]}.

--S
From: Bryan Oakley on 12 Mar 2010 16:46
On Mar 12, 3:23 pm, CKL <christian.klugesh...(a)gmail.com> wrote:
> Hello tcl gurus
>
> I'm sure that the question has already been asked a lot of times, but
> it's difficult to find the right syntax to find an answer to my
> question
> So I ask it again
>
> #let following variable.
> set a(3) "My variable"
>
> # Now another way
> set index "(3)"
> set base "a"
> set var $base$index
> puts $var
> a(3)
>
> # What I want is now $a(3) which should give me "My Variable"
>
> puts $$var
> $a(3)
>
> Has anybody a solution

The short answer (and others will probably give a long explanation so
I'll avoid the temptation) is:

puts [set $var]

But... don't do that. It is soooooooo much easier to use arrays:

set var($base,$index) "My Variable"
...
puts $var($base,$index)


Arrays are much easier to deal with than dynamic variable names.
From: CKL on 12 Mar 2010 17:05
On 12 mar, 22:46, Bryan Oakley <oak...(a)bardo.clearlight.com> wrote:
> On Mar 12, 3:23 pm, CKL <christian.klugesh...(a)gmail.com> wrote:
>
>
>
> > Hello tcl gurus
>
> > I'm sure that the question has already been asked a lot of times, but
> > it's difficult to find the right syntax to find an answer to my
> > question
> > So I ask it again
>
> > #let following variable.
> > set a(3) "My variable"
>
> > # Now another way
> > set index "(3)"
> > set base "a"
> > set var $base$index
> > puts $var
> > a(3)
>
> > # What I want is now $a(3) which should give me "My Variable"
>
> > puts $$var
> > $a(3)
>
> > Has anybody a solution
>
> The short answer (and others will probably give a long explanation so
> I'll avoid the temptation) is:
>
>     puts [set $var]
>
> But... don't do that. It is soooooooo much easier to use arrays:
>
>     set var($base,$index) "My Variable"
>     ...
>     puts $var($base,$index)
>
> Arrays are much easier to deal with than dynamic variable names.

Thanks to all

Regards

Christian
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