I do not understand the option -real
% lsearch -real {0 1 2} 0.0
-1
% lsearch -real {0 1 2} 0
0 % lsearch -real {0.0 1 2} 0.00
-1
% lsearch -exact {0.0 1 2} 0.00
-1
% lsearch -exact {0.0 1 2} 0.0
0 %
------------
it does not recognize
0 in {0 1 2} as the same as 0.0
0.0 in {0.0 1 2} as the same as 0
------------
to do a exact matching I could use: lsearch -exact ..
-----------
so how shall I expect the option -real is working?
---------
Thanks for responding!
Manfred

On 26/1/23 10:25, Manfred Rosenberger wrote:
> I do not understand the option -real
> % lsearch -real {0 1 2} 0.0
> -1
> % lsearch -real {0 1 2} 0
> 0
> % lsearch -real {0.0 1 2} 0.00
> -1
> % lsearch -exact {0.0 1 2} 0.00
> -1
> % lsearch -exact {0.0 1 2} 0.0
> 0
> %
> ------------
> it does not recognize
> 0 in {0 1 2} as the same as 0.0
> 0.0 in {0.0 1 2} as the same as 0
> ------------
> to do a exact matching I could use: lsearch -exact ..
> -----------
> so how shall I expect the option -real is working?
> ---------
> Thanks for responding!
> Manfred

% lsearch -exact -real {0.0 1 2} 0.00
0

man n lsearch

On Thursday, January 26, 2023 at 1:25:50 AM UTC+1, manfred wrote:
> I do not understand the option -real
> % lsearch -real {0 1 2} 0.0
> -1
> % lsearch -real {0 1 2} 0
> 0
> % lsearch -real {0.0 1 2} 0.00
> -1
> % lsearch -exact {0.0 1 2} 0.00
> -1
> % lsearch -exact {0.0 1 2} 0.0
> 0
> %
> ------------
> it does not recognize
> 0 in {0 1 2} as the same as 0.0
> 0.0 in {0.0 1 2} as the same as 0
> ------------
> to do a exact matching I could use: lsearch -exact ..
> -----------
> so how shall I expect the option -real is working?

Also note that you can search newsgroups.

Thread "lsearch -real not working as expected" is a prominent search results for "lsearch real".

To be fair, the wiki search did not help. Also, that thread is as old as COVID-19. But as you can see, the community will help out anyway ;-)

* pd <pd@anon.net>
| On 26/1/23 10:25, Manfred Rosenberger wrote:
| > I do not understand the option -real
| > % lsearch -real {0 1 2} 0.0
| > -1
| > % lsearch -real {0 1 2} 0
| > 0
| > % lsearch -real {0.0 1 2} 0.00
| > -1
| > % lsearch -exact {0.0 1 2} 0.00
| > -1
| > % lsearch -exact {0.0 1 2} 0.0
| > 0
| > %
| > ------------
| > it does not recognize
| > 0 in {0 1 2} as the same as 0.0
| > 0.0 in {0.0 1 2} as the same as 0
| > ------------
| > to do a exact matching I could use: lsearch -exact ..
| > -----------
| > so how shall I expect the option -real is working?
| > ---------
| > Thanks for responding!
| > Manfred
>
| % lsearch -exact -real {0.0 1 2} 0.00
| 0
>
| man n lsearch

To be precise:

CONTENTS DESCRIPTION OPTIONS
These options describe how to interpret the items in the list being
searched. ***They are only meaningful when used with the -exact and
-sorted options.***

(*** emphasis by me)

-real The list elements are to be compared as floating-point values.

So you need both -real *and* -exact.

R'

I see!
thx a lot!
Manfred