# Convert list

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Hello.

I have a list:

`(("n1" 74678.6 53741.6 0.0) ("n2" 74683.8 53741.6 0.0) ("n3" 74683.8 53747.6 0.0) ("n4" 74677.6 53747.6 0.0))`

I can not convert it to this kind:

`(n1 74678.6 53741.6 0.0) (n2 74683.8 53741.6 0.0) (n3 74683.8 53747.6 0.0) (n4 74677.6 53747.6 0.0)`

Please tell me how it can be done.

Thank.

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Start list is one variable. Final list is 4 variables. I think it's impossible to convert quite right you want.

(setq lst '(("n1" 74678.6 53741.6 0.0) ("n2" 74683.8 53741.6 0.0) ("n3" 74683.8 53747.6 0.0) ("n4" 74677.6 53747.6 0.0)))
(mapcar (function (lambda(x)(cons (read (car x)) (cdr x)))) lst))

;; returns : '((N1 74678.6 53741.6 0.0) (N2 74683.8 53741.6 0.0) (N3 74683.8 53747.6 0.0) (N4 74677.6 53747.6 0.0))

;; using nth, foreach, mapcar etc you can get access to any element of list

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48 minutes ago, kpblc said:

Start list is one variable. Final list is 4 variables. I think it's impossible to convert quite right you want.﻿

(setq lst '(("n1" 74678.6 53741.6 0.0) ("n2" 74683.8 53741.6 0.0) ("n3" 74683.8 53747.6 0.0) ("n4" 74677.6 53747.6 0.0)))
(mapcar (function (lambda(x)(cons (read (car x)) (cdr x)))) lst))﻿

;; returns : '((N1 74678.6 53741.6 0.0) (N2 74683.8 53741.6 0.0) (N3 74683.8 53747.6 0.0) (N4 74677.6 53747.6 0.0))

;; using nth﻿, foreach, mapcar etc you can get access to any element of list

Thank you very match....That's what I need

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Posted (edited)

Assuming that the list is consistent -

```(setq L '(("n1" 74678.6 53741.6 0.0) ("n2" 74683.8 53741.6 0.0) ("n3" 74683.8 53747.6 0.0) ("n4" 74677.6 53747.6 0.0)))

(
'((L)
(apply 'mapcar
(cons 'list
(cons
(cdr L)
)
)
)
)
(apply 'mapcar (cons 'list L))
)```

Edited by Grrr

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I wanted to put this list in list_box DCL,

I did it like this ...

```;+++++++++++++
(defun List_for_Box ( list_ / qwer )
(foreach item list_
(setq qwer
(strcat	"\n"
"       "
(car item)
"       "
(rtos (nth 1 item))
"       "
(rtos (nth 2 item))
"       "
(rtos (nth 3 item))
)

ptlist_DCL (cons qwer ptlist_DCL)
)
); end of foreach
ptlist_DCL
); end of defun
;+++++++++++++

(setq ptlist_DCL (List_for_Box (("n1" 74678.6 53741.6 0.0) ("n2" 74683.8 53741.6 0.0) ("n3" 74683.8 53747.6 0.0) ("n4" 74677.6 53747.6 0.0)))
show_coord (reverse ptlist_DCL)
)
;-----------------------------------
(start_list "Coord")
(end_list)
;-----------------------------------

```

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For what it's worth, you needn't iterate over the list repeatedly - you can construct the string whilst adding items to the list box, e.g.:

```(setq lst '(("n1" 74678.6 53741.6 0.0) ("n2" 74683.8 53741.6 0.0) ("n3" 74683.8 53747.6 0.0) ("n4" 74677.6 53747.6 0.0)))
(start_list "Coord")
(foreach itm lst
(add_list (apply 'strcat (cons (car lst) (mapcar '(lambda ( x ) (strcat "       " (rtos x))) (cdr lst)))))
)
(end_list)```

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