GBBopen 1.5 Reference -- splitting-butlast

splitting-butlast

splitting-butlast list &optional n => result-list, tail [Function]

Purpose
Return all but the last n elements of list and, as a second value, the tail containing those last n elements.

Package :gbbopen-tools

Module :gbbopen-tools

Arguments and values

list		A proper list or a dotted list
n		A non-negative integer (default is `1`)
result-list		A proper list
tail		A proper list or a dotted list

Returns
Two values:

a copy of list up to, but not including, the last n conses
the unused tail of list

Examples

  > (splitting-butlast '(a b c d e))
  (a b c d)
  (e)
  > (splitting-butlast '(a b c d e) 3)
  (a b)
  (c d e)
  > (splitting-butlast '(a b . c))
  (a)
  (b . c)
  >

The GBBopen Project

splitting-butlast