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