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65 lines
1.8 KiB
Plaintext
65 lines
1.8 KiB
Plaintext
NAME
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select - form a list by selecting element-values from a given list
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SYNOPSIS
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select(x, y)
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TYPES
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x list
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y string
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return list
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DESCRIPTION
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If y is to be the name of a user-defined function, select(x, y)
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returns a list whose members are the values z of elements of x
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for which the function at z tests as nonzero.
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The list x is not changed. The order of the returned list is
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the same as in x.
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EXAMPLE
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> define f(x) = x > 5
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> A = list(2,4,6,8,2,7)
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> print select(A, "f")
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list (3 elements, 3 nonzero):
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[[0]] = 6
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[[1]] = 8
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[[2]] = 7
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LIMITS
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none
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LINK LIBRARY
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none
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SEE ALSO
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XXX - fill in
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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: select,v 29.1 1999/12/14 09:16:06 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/select,v $
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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://reality.sgi.com/chongo/
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## Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
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