jdk8-mips64-public/nashorn: samples/uniq.js@41be00d23622

8042600: Add more samples in nashorn/samples directory
Reviewed-by: jlaskey, hannesw

     1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  *

     8  *   - Redistributions of source code must retain the above copyright

     9  *     notice, this list of conditions and the following disclaimer.

    10  *

    11  *   - Redistributions in binary form must reproduce the above copyright

    12  *     notice, this list of conditions and the following disclaimer in the

    13  *     documentation and/or other materials provided with the distribution.

    14  *

    15  *   - Neither the name of Oracle nor the names of its

    16  *     contributors may be used to endorse or promote products derived

    17  *     from this software without specific prior written permission.

    18  *

    19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

    20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    30  */

    32 // Usage: jjs uniq.js

    33 // or: jjs uniq.js -- <file>

    35 // omit repeated lines and print unique lines

    37 var BufferedReader = Java.type("java.io.BufferedReader");

    38 var FileReader = Java.type("java.io.FileReader");

    39 var InputStreamReader = Java.type("java.io.InputStreamReader");

    40 var System = Java.type("java.lang.System");

    42 // use object as set - but insertion order preserved

    43 var uniqueLines = {};

    44 var reader = arguments.length > 0 ?

    45     new FileReader(arguments[0])  :

    46     new InputStreamReader(System.in);

    47 reader = new BufferedReader(reader);

    49 // add unique lines

    50 reader.lines().forEach(function(line) {

    51     uniqueLines[line] = true;

    52 })

    54 for (line in uniqueLines) {

    55     print(line);

    56 }

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