Re: Fwd: playing with IFS

On 2026-04-13 08:53, Mark J. Reed wrote:
>
> On Sun, Apr 12, 2026 at 10:47 PM dana <[email protected]> wrote:
>
>     i don't see the difference
>
> The first one tries to put expansion flags in {} instead of (). That's 
> nothing to do with spaces, Ray. It's always ${(flags)...} - curlies on 
> the outside, parens on the inside.
I know it.  A simple typo.  Cost me hours trying to figure out what was 
wrong :(  Just a lazy eye.
> .
> As for this:
>
>      sed -r 's/(\x1b\[K[:-]\x1b\[m\x1b\[K)[[:space:]]*/\1 /g'
>
> Even if you stick with sed you might prefer an ANSI string version of 
> the command:
>
>  $'s/(\e\\[K[:-]\e\\[m\e\\[K)[ \t]*/\\1 /g'
What an improvement!  That $' ' quoting ... still don't understand it or 
use it.  This is all mods to grep colorizations, which are so overloaded 
with superfluous codes -- but I'm told that grep is extra careful due to 
the fact that some terminals might need them.  Still, I'd take native 
zsh code if it would work -- no pipes, no '<<<', no '$()'.  All this sed 
stuff -- good example of 'write only' code -- I know what it means when 
I write it, but an hour later it's gibberish.

BTW point of it is to remove leading spaces from grep lines. Quite nice.

https://drive.google.com/file/d/1175Pjfx0RTjs5vbA9yqx62eOwg-4jnxW/view?usp=sharing