Athijegannathan Sundararajan | 6a63d39 | 2014-05-30 17:22:38 +0530 | [diff] [blame] | 1 | #nashorn word histogram of a file |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
Attila Szegedi | 4f4ccbc | 2014-08-20 10:25:28 +0200 | [diff] [blame] | 5 | * |
Athijegannathan Sundararajan | 6a63d39 | 2014-05-30 17:22:38 +0530 | [diff] [blame] | 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
Attila Szegedi | 4f4ccbc | 2014-08-20 10:25:28 +0200 | [diff] [blame] | 9 | * |
Athijegannathan Sundararajan | 6a63d39 | 2014-05-30 17:22:38 +0530 | [diff] [blame] | 10 | * - Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
Attila Szegedi | 4f4ccbc | 2014-08-20 10:25:28 +0200 | [diff] [blame] | 12 | * |
Athijegannathan Sundararajan | 6a63d39 | 2014-05-30 17:22:38 +0530 | [diff] [blame] | 13 | * - Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
Attila Szegedi | 4f4ccbc | 2014-08-20 10:25:28 +0200 | [diff] [blame] | 16 | * |
Athijegannathan Sundararajan | 6a63d39 | 2014-05-30 17:22:38 +0530 | [diff] [blame] | 17 | * - Neither the name of Oracle nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific prior written permission. |
Attila Szegedi | 4f4ccbc | 2014-08-20 10:25:28 +0200 | [diff] [blame] | 20 | * |
Athijegannathan Sundararajan | 6a63d39 | 2014-05-30 17:22:38 +0530 | [diff] [blame] | 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 22 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 23 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 25 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 27 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 28 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * This example demonstrates how to print word histogram |
| 36 | * of a given text file using regex, array and JSON |
| 37 | * functions. |
| 38 | */ |
| 39 | |
| 40 | if (arguments.length < 1) { |
| 41 | print("Usage: jjs -scripting word_histogram.js -- <file>"); |
| 42 | exit(1); |
| 43 | } |
| 44 | |
| 45 | var obj = {}; |
| 46 | |
| 47 | readFully(arguments[0]). |
| 48 | split(/[^\w+]/). |
| 49 | forEach(function(x) |
| 50 | (x in obj? obj[x]++ : obj[x] = 1)); |
| 51 | |
| 52 | print(JSON.stringify(obj)); |
| 53 | |