Re: confused about lists and strings...

On Wed, 2 Jul 2025 11:27:54 +0200, Harald Oehlmann wrote:

Am 02.07.2025 um 10:39 schrieb Mark Summerfield:

proc process1 args {
     set first [lindex $args 0]
     puts "first='$first' args='$args' list? [string is list -strict $args]"
     set rest [lrange $args 1 end]
     puts "rest='$rest' list? [string is list -strict $rest]"
}

 
The name "args" is special in TCL returning all remaining arguments as a
list.
 
As you call:
process1 $argv
 
The one argument is put in a list. The result is a matrix (list in list).
 
How to solve:
 
a) don't use "args":
 
proc process1 myargs {
       set first [lindex $myargs 0]
       puts "first='$first' args='$myargs' list? [string is list -strict
$myargs]"
       set rest [lrange $myargs 1 end]
       puts "rest='$rest' list? [string is list -strict $rest]"
}
 
b) use the delist operator:
 
process {*}$argv
 
Hope this helps,
Harald

Thanks, I hadn't realised that using `args` would give me a list in a list.
I now just pass the list as-is (and called `rest` to avoid confusion!).