Duplicate in a list

[RepCad]

hi all, i need a function to find duplicate value or text in a list.

can someone help me??

 

thanks in advance.

[Tharwat]

Hi,

 

Can you give a real example?

[rlx]

http://www.cadtutor.net/forum/showthread.php?53600-duplicate-items-on-list

 

 

If you scroll down the page of a (any) thread you see 'Similar Threads' ... this should help you in your search

 

 

or :

 

 

http://www.lee-mac.com/uniqueduplicate.html

 

 

gr. Rlx

Edited January 12, 2018 by rlx

[ronjonp]

Maybe something as simple as this:

(defun foo (item lst) (vl-remove-if-not '(lambda (x) (equal item x)) lst))
;; (foo "1" '("1" "2" "3" "1" "1" "5" "1.0"))

[Grrr]

Ron,

_$ (foo "1" '("1" "2" "3" "1" "1" "5" "1.0"))
("1" "1" "1")

 

If he ment 'duplicate value' then "1.0" should be returned aswell, I think.

The OP should provide a sample list... and what he expects to be returned.

[ronjonp]

Agreed .. just a quick example, not full blown solution. My guess is the OP probably want's a fuzz value too for numbers that should be 'equal'.

[RepCad]

Thank you all guys, i used lee mac function that rlx introduced.

[Lee Mac]

Thank you all guys, i used lee mac function that rlx introduced.

 

Glad it helped! Thanks for the recommendation rlx