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From: Rich <rich@example.invalid>
Newsgroups: comp.lang.tcl
Subject: Re: Array get element with default (no error if not exist)
Date: Sun, 18 Aug 2024 16:43:41 -0000 (UTC)
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RodionGork <rodiongork@github.com> wrote:
> Thank you, this definitely makes sense!
> 
> I remember about issue with passing/returning array in functions. By the
> way I still am not sure why it works with global for example... if they
> are actually different variables, every key-pair :) e.g. like here:
> 
> https://github.com/RodionGork/languages-benchmark/blob/main/02-primes/primes_a.tcl#L7

Because the [global] command works with names of variables, not the 
actual variables.  It links the global variable with the given name, to 
a local variable of the same name, inside the proc.  If the global name 
references an array, then the new local name inside the proc references 
the same array.