Mercurial > jdk8-mips64-public > nashorn / annotate
samples/word_histogram.js@b1a7da25b547 (annotated)
samples/word_histogram.js
Wed, 27 Apr 2016 01:36:41 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:36:41 +0800
- changeset 0
- b1a7da25b547
- child 962
- ac62e33a99b0
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/nashorn/
changeset: 1034:4b9cc65dd24d
tag: jdk8u25-b17
| aoqi@0 | 1 | #nashorn word histogram of a file |
| aoqi@0 | 2 | |
| aoqi@0 | 3 | /* |
| aoqi@0 | 4 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 5 | * |
| aoqi@0 | 6 | * Redistribution and use in source and binary forms, with or without |
| aoqi@0 | 7 | * modification, are permitted provided that the following conditions |
| aoqi@0 | 8 | * are met: |
| aoqi@0 | 9 | * |
| aoqi@0 | 10 | * - Redistributions of source code must retain the above copyright |
| aoqi@0 | 11 | * notice, this list of conditions and the following disclaimer. |
| aoqi@0 | 12 | * |
| aoqi@0 | 13 | * - Redistributions in binary form must reproduce the above copyright |
| aoqi@0 | 14 | * notice, this list of conditions and the following disclaimer in the |
| aoqi@0 | 15 | * documentation and/or other materials provided with the distribution. |
| aoqi@0 | 16 | * |
| aoqi@0 | 17 | * - Neither the name of Oracle nor the names of its |
| aoqi@0 | 18 | * contributors may be used to endorse or promote products derived |
| aoqi@0 | 19 | * from this software without specific prior written permission. |
| aoqi@0 | 20 | * |
| aoqi@0 | 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| aoqi@0 | 22 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| aoqi@0 | 23 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| aoqi@0 | 24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| aoqi@0 | 25 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| aoqi@0 | 26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| aoqi@0 | 27 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| aoqi@0 | 28 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| aoqi@0 | 29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| aoqi@0 | 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| aoqi@0 | 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| aoqi@0 | 32 | */ |
| aoqi@0 | 33 | |
| aoqi@0 | 34 | /* |
| aoqi@0 | 35 | * This example demonstrates how to print word histogram |
| aoqi@0 | 36 | * of a given text file using regex, array and JSON |
| aoqi@0 | 37 | * functions. |
| aoqi@0 | 38 | */ |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | if (arguments.length < 1) { |
| aoqi@0 | 41 | print("Usage: jjs -scripting word_histogram.js -- <file>"); |
| aoqi@0 | 42 | exit(1); |
| aoqi@0 | 43 | } |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | var obj = {}; |
| aoqi@0 | 46 | |
| aoqi@0 | 47 | readFully(arguments[0]). |
| aoqi@0 | 48 | split(/[^\w+]/). |
| aoqi@0 | 49 | forEach(function(x) |
| aoqi@0 | 50 | (x in obj? obj[x]++ : obj[x] = 1)); |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | print(JSON.stringify(obj)); |
| aoqi@0 | 53 |
