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82 lines
2.2 KiB
Plaintext
82 lines
2.2 KiB
Plaintext
NAME
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push - push one or more values into the front of a list
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SYNOPSIS
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push(x, y_0, y_1, ...)
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TYPES
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x lvalue whose value is a list
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y_0, ... any
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return null value
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DESCRIPTION
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If after evaluation of y_0, y_1, ..., x is a list with
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contents (x_0, x_1, ...), then after push(x, y_0, y_1, ..., y_n-1),
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x has contents (y_n-1, ..., y_1, y_0, x_0, x_1, ...), i.e. the
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values of y_0, y_1, ... are inserted in succession at the beginning
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of the list.
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This function is equivalent to insert(x, 0, y_n-1, ..., y_1, y_0).
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EXAMPLE
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> A = list(2,"three")
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> print A
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list (2 elements, 2 nonzero):
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[[0]] = 2
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[[1]] = "three"
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> push(A, 4i, 7^2)
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> print A
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list (4 elements, 4 nonzero):
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[[0]] = 49
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[[1]] = 4i
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[[2]] = 2
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[[3]] = "three"
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> push (A, pop(A), pop(A))
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> print A
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list (4 elements, 4 nonzero):
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[[0]] = 4i
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[[1]] = 49
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[[2]] = 2
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[[3]] = "three"
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LIMITS
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push() can have at most 100 arguments
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LINK LIBRARY
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none
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SEE ALSO
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append, delete, insert, islist, list, pop, remove, rsearch, search, size
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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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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## @(#) $Revision: 29.1 $
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## @(#) $Id: push,v 29.1 1999/12/14 09:16:03 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/push,v $
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##
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## Under source code control: 1994/03/19 03:13:20
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## File existed as early as: 1994
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##
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## chongo <was here> /\oo/\ http://reality.sgi.com/chongo/
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## Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
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