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From: dxf <dxforth@gmail.com>
Newsgroups: comp.lang.forth
Subject: Re: Parsing timestamps?
Date: Mon, 7 Oct 2024 23:53:59 +1100
Organization: i2pn2 (i2pn.org)
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On 7/10/2024 2:34 am, dxf wrote:
> ... 
> Bug fix:
> 
> variable cnt
> 
> : @SEC ( a u -- ud )  \ HH:MM:SS or free-form
>   0 cnt !  3 0 do
>     0 0 2swap >number rot drop ( u ... a u)
>     dup if  1 /string  1 cnt +!  then
>   loop 2drop  cnt @ 1+ 0 do  rot  loop ( fixup)
> ; \  swap secs/min * +  swap secs/hour um*  rot 0 d+ ;
> 
> : .3 ( h m s -- )  cr rot . swap . . ;
> 
> s" 00:00:06" @sec .3
> s" 00:06:00" @sec .3
> s" 06:00:00" @sec .3
> cr
> s" 06"       @sec .3
> s" 06:00"    @sec .3
> s" 06:00:00" @sec .3

That's not foolproof either!  My conclusion is the only reliable way to do it
is as per the 'Reverse SCAN SPLIT' thread.