Hi,

is there the opposite of butlast ?

Check the documents: List Operations.

in OM 2 ?

(butlast '(1 2 3 4 5))
=>(1 2 3 4)
(last '(1 2 3 4 5))
=>(5)
(butlast '(1 2 3 4 5) 1) 
=>(1 2 3 4)
(last '(1 2 3 4 5) 1)
=>(5)
(butlast '(1 2 3 4 5) 3)
=>(1 2)
(last '(1 2 3 4 5) 3)
=>(3 4 5)

 

or from the start

(nthcdr 2 '(1 2 3 4 5))
=>(3 4 5)
 

Jesper

 

If the opposite of butlast is "butfirst" then in plain lisp is:

 

(cdr '(1 2 3 4 5)) => (2 3 4 5)

or 

(subseq '(1 2 3 4 5) 1)

 

Achim

 

or 

(rest '(1 2 3 4 5))
=> (2 3 4 5)

 

or (extended)

 

(car

(cdr

(cadr

(cddr

(nthcdr

 ....

 

CLHS: Accessor CAR, CDR, CAAR, CADR, CDAR...

CLHS.LISP.SE

 

nthcdr (Programming in Emacs Lisp)

WWW.GNU.ORG

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nthcdr (Programming in Emacs Lisp)