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#!/usr/bin/rexx
/*----------------------------------------------------------------------------*/
/* */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved. */
/* Copyright (c) 2005-2006 Rexx Language Association. All rights reserved. */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the Common Public License v1.0 which accompanies this */
/* distribution. A copy is also available at the following address: */
/* http://www.oorexx.org/license.html */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in */
/* the documentation and/or other materials provided with the distribution. */
/* */
/* Neither the name of Rexx Language Association nor the names */
/* of its contributors may be used to endorse or promote products */
/* derived from this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS */
/* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED */
/* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */
/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY */
/* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* */
/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* pipe.rex Open Object Rexx Samples */
/* */
/* Show samples uses of the pipe implementation in pipe.rex */
/* */
/* */
/* -------------------------------------------------------------------------- */
/* */
/* Description: */
/* This program demonstrates how one could use the pipes implemented in the */
/* pipe sample. */
/******************************************************************************/
info = .array~of('Tom','Mike','Rick','Steve') /* Create an array to use */
/* stages on (any collection */
/* would work). */
pipe = .sort|.reverse|.console /* Pipe to sort, reverse */
/* elements and display. */
pipe~go(info) /* Run it */
say '-----------------------------------'
pipe = .all['e']|.console /* Pipe to select elements with*/
/* 'e' and display. */
pipe~go(info) /* Run it */
say '-----------------------------------'
valueArray1 = .array~new
indexArray1 = .array~new
valueArray2 = .array~new
indexArray2 = .array~new
-- this hooks stagess up to two different output streams
-- the >> secondary stage must preceed the primary hooked up to the same
-- stage
pipe = .all['e'] >> .arraycollector[valueArray2, indexArray2] > .arraycollector[valueArray1, indexArray1]
pipe~go(info) /* Run it */
say 'Items selected by all are'
index = valueArray1~first
do while index <> .nil
say index "#" indexArray1[index] ":" valueArray1[index]
index = valueArray1~next(index)
end
say
say 'Items not selected by all are'
index = valueArray2~first
do while index <> .nil
say index "#" indexArray2[index] ":" valueArray2[index]
index = valueArray2~next(index)
end
say '-----------------------------------'
pipe = .sort|.stemcollector[a.] /* Pipe to sort, put in a. */
pipe~go(info) /* Run it */
Do i = 1 To a.0 /* Show stem values */
--Say a.i.index ":" a.i.value
-- index is 'The NIL object' here. Don't know why a.i.'INDEX' doesn't work...
Say a.[i, 'INDEX'] ":" a.i.value
End
say '-----------------------------------'
valueArray1 = .array~new
indexArray1 = .array~new
valueArray2 = .array~new
indexArray2 = .array~new
pivot = 'S'
pipe = .pivot[pivot, .arraycollector[valueArray1, indexArray1], .arraycollector[valueArray2, indexArray2]]
pipe~go(info) /* Run it */
say 'Items less than pivot' pivot 'are'
index = valueArray1~first
do while index <> .nil
say index "#" indexArray1[index] ":" valueArray1[index]
index = valueArray1~next(index)
end
say
say 'Items greater than or equal to pivot' pivot 'are'
index = valueArray2~first
do while index <> .nil
say index "#" indexArray2[index] ":" valueArray2[index]
index = valueArray2~next(index)
end
::REQUIRES 'pipe'

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