nashorn/samples/uniqs.js
author sundar
Wed, 07 May 2014 20:20:58 +0530
changeset 24283 bda887c0088a
child 26067 b32ccc3a76c9
permissions -rw-r--r--
8042600: Add more samples in nashorn/samples directory Reviewed-by: jlaskey, hannesw
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/*
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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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 * 
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 
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 *   - Redistributions of source code must retain the above copyright
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 *     notice, this list of conditions and the following disclaimer.
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 * 
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 *   - Redistributions in binary form must reproduce the above copyright
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 *     notice, this list of conditions and the following disclaimer in the
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 *     documentation and/or other materials provided with the distribution.
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 * 
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 *   - Neither the name of Oracle nor the names of its
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 *     contributors may be used to endorse or promote products derived
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 *     from this software without specific prior written permission.
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 * 
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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// Usage: jjs uniqs.js -- <file>
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// omit repeated lines and print unique lines
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// But this version uses Stream API 
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if (arguments.length < 1) {
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    print("Usage: jjs uniqs.js -- <file>");
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    exit(1);
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}
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var Files = Java.type("java.nio.file.Files");
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var FileSystems = Java.type("java.nio.file.FileSystems");
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print('Unique lines:',
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   Files
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    .lines(FileSystems.default.getPath(arguments[0]))
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    .distinct()
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    .peek(print)
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    .count());