Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: saito <saitology9@gmail.com>
Newsgroups: comp.lang.tcl
Subject: Re: Problems with paths of Windows
Date: Sun, 18 May 2025 06:35:38 -0400
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On 5/17/2025 10:36 PM, Luis Alejandro Muzzachiodi wrote:

> given the following procedure
> proc myproc { listofpaths } {
>      foreach p  $listofpaths {
>          puts "$p - is valid? : [file isdirectory $p]"
>      }
> }
> if a parameter is passed as "$::env(SystemRoot)\my dir"
> the result obtained is
> C:Windowsmy - is valid? : 0
> dir - is valid? : 0

You know, the problem here is something else completely: your proc is 
expecting a list of file names. Instead it gets a string containing a 
single file name.  So what happens is that the foreach loop takes that 
string, splits it into a list at each space character, and processes 
each part separately. So "$::env(SystemRoot)\my dir" turns into 
"$::env(SystemRoot)\my" and "dir" as you see in your output. You don't 
want this implicit conversion.

Instead, turn your input into a proper list before calling your proc 
above and all should be good.