Mercurial > jdk8-mips64-public > nashorn / annotate
samples/uniq.js@2f1b9f4daec1 (annotated)
samples/uniq.js
Fri, 05 Jun 2015 12:38:53 +0200
- author
- mhaupt
- date
- Fri, 05 Jun 2015 12:38:53 +0200
- changeset 1398
- 2f1b9f4daec1
- parent 962
- ac62e33a99b0
- child 1205
- 4112748288bb
- permissions
- -rw-r--r--
8080087: Nashorn $ENV.PWD is originally undefined
Summary: On Windows, the PWD environment variable does not exist and cannot be imported in scripting mode, so it is set explicitly.
Reviewed-by: lagergren, sundar
| jlaskey@3 | 1 | /* |
| sundar@851 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| attila@962 | 3 | * |
| jlaskey@3 | 4 | * Redistribution and use in source and binary forms, with or without |
| jlaskey@3 | 5 | * modification, are permitted provided that the following conditions |
| jlaskey@3 | 6 | * are met: |
| attila@962 | 7 | * |
| jlaskey@3 | 8 | * - Redistributions of source code must retain the above copyright |
| jlaskey@3 | 9 | * notice, this list of conditions and the following disclaimer. |
| attila@962 | 10 | * |
| jlaskey@3 | 11 | * - Redistributions in binary form must reproduce the above copyright |
| jlaskey@3 | 12 | * notice, this list of conditions and the following disclaimer in the |
| jlaskey@3 | 13 | * documentation and/or other materials provided with the distribution. |
| attila@962 | 14 | * |
| jlaskey@3 | 15 | * - Neither the name of Oracle nor the names of its |
| jlaskey@3 | 16 | * contributors may be used to endorse or promote products derived |
| jlaskey@3 | 17 | * from this software without specific prior written permission. |
| attila@962 | 18 | * |
| jlaskey@3 | 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| jlaskey@3 | 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| jlaskey@3 | 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| jlaskey@3 | 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| jlaskey@3 | 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| jlaskey@3 | 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| jlaskey@3 | 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| jlaskey@3 | 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| jlaskey@3 | 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| jlaskey@3 | 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| jlaskey@3 | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| jlaskey@3 | 30 | */ |
| jlaskey@3 | 31 | |
| sundar@851 | 32 | // Usage: jjs uniq.js |
| sundar@851 | 33 | // or: jjs uniq.js -- <file> |
| jlaskey@3 | 34 | |
| sundar@851 | 35 | // omit repeated lines and print unique lines |
| sundar@851 | 36 | |
| sundar@851 | 37 | var BufferedReader = Java.type("java.io.BufferedReader"); |
| sundar@851 | 38 | var FileReader = Java.type("java.io.FileReader"); |
| sundar@851 | 39 | var InputStreamReader = Java.type("java.io.InputStreamReader"); |
| sundar@851 | 40 | var System = Java.type("java.lang.System"); |
| sundar@851 | 41 | |
| sundar@851 | 42 | // use object as set - but insertion order preserved |
| sundar@851 | 43 | var uniqueLines = {}; |
| sundar@851 | 44 | var reader = arguments.length > 0 ? |
| sundar@851 | 45 | new FileReader(arguments[0]) : |
| sundar@851 | 46 | new InputStreamReader(System.in); |
| sundar@851 | 47 | reader = new BufferedReader(reader); |
| sundar@851 | 48 | |
| sundar@851 | 49 | // add unique lines |
| sundar@851 | 50 | reader.lines().forEach(function(line) { |
| sundar@851 | 51 | uniqueLines[line] = true; |
| sundar@851 | 52 | }) |
| sundar@851 | 53 | |
| sundar@851 | 54 | for (line in uniqueLines) { |
| sundar@851 | 55 | print(line); |
| jlaskey@3 | 56 | } |
