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NAME
segment - segment from and to specified elements of a list
SYNOPSIS
segment(x, y, z)
TYPES
x list
y, z int
return list
DESCRIPTION
For 0 <= y < size(x) and 0 <= z < size(x), segment(x, y, z)
returns a list for which the values of the elements are those
of the segment of x from x[[y]] to x[[z]]. If y < z, the
new list is in the same order as x; if y > z, the order is
reversed.
If y < z, x == join(head(x,y), segment(x,y,z), tail(x, size(x) - z - 1)).
EXAMPLE
; A = list(2, 3, 5, 7, 11)
; segment(A, 1, 3)
list (3 members, 3 nonzero):
[[0]] = 3
[[1]] = 5
[[2]] = 7
; segment(A, 3, 1)
list (3 members, 3 nonzero):
[[0]] = 7
[[1]] = 5
[[2]] = 3
LIMITS
0 <= y < size(x)
0 <= z < size(x)
LINK LIBRARY
none
SEE ALSO
head, tail
## Copyright (C) 1999 Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL. You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## Under source code control: 1995/07/10 02:09:31
## File existed as early as: 1995
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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