select

Calc Software Package for Number Calc

NAME
    select - form a list by selecting element-values from a given list

SYNOPSIS
    select(x, y)

TYPES
    x		list
    y		string

    return	list

DESCRIPTION
    If y is to be the name of a user-defined function, select(x, y)
    returns a list whose members are the values z of elements of x
    for which the function at z tests as nonzero.
    The list x is not changed.	The order of the returned list is
    the same as in x.

EXAMPLE
    ; define f(x) = x > 5
    ; A = list(2,4,6,8,2,7)
    ; print select(A, "f")

    list (3 elements, 3 nonzero):
	  [[0]] = 6
	  [[1]] = 8
	  [[2]] = 7

LIMITS
    none

LINK LIBRARY
    none

SEE ALSO
     append, delete, insert, islist, pop, push, remove, rsearch, search,
     size

## Copyright (C) 1999-2006  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.
## 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
##
## @(#) $Revision: 29.4 $
## @(#) $Id: select,v 29.4 2006/06/25 22:16:55 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/select,v $
##
## 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/