Cool! Though I'm glad I don't have to debug any of those expressions.

On Sunday, May 14, 2023 at 10:52:45 AM UTC-4 jkn wrote:

> As a slight aside: I knew about the 'bc' (bench calculator) program in 
> Linux/Unix, and I also knew there was a 'dc' (desk calculator) in Linux/Unix
>
> What I didn't realise, and have only just learned, is:
>
> * dc is the original and runs RPN
> * dc predates the C programming language; it is the oldest surviving Unix 
> program, and Ken Thompson has opined that it was the first one written (in 
> B) for the PDP-ll running Unix
> * the BC program is written on top of dc.
>
> https://en.wikipedia.org/wiki/Dc_(computer_program)
>
>
> On Tuesday, May 2, 2023 at 11:04:55 AM UTC+1 Edward K. Ream wrote:
>
>
>
> On Tue, May 2, 2023 at 4:35 AM jkn <jkn...@nicorp.f9.co.uk> wrote:
>
> s/write/right/, of course ;-o
>
>
> Hehe.  I remember *screaming* in frustration while using some nerdy 
> sed-like text editor while working at IBM 50+ years ago. My work on editors 
> began with those screams.
>
> Edward
>
>

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