Mercurial > jdk8-mips64-public > nashorn / annotate
samples/weather.js@b1a7da25b547 (annotated)
samples/weather.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
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http://hg.openjdk.java.net/jdk8u/jdk8u/nashorn/
changeset: 1034:4b9cc65dd24d
tag: jdk8u25-b17
| aoqi@0 | 1 | #// usage: jjs -scripting weather.js |
| 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 | // Simple nashorn example showing back-quote exec process, |
| aoqi@0 | 35 | // JSON and Java8 streams |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | var Arrays = Java.type("java.util.Arrays"); |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | // use curl to download JSON weather data from the net |
| aoqi@0 | 40 | // use backquote -scripting mode syntax to exec a process |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | `curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`; |
| aoqi@0 | 43 | |
| aoqi@0 | 44 | // parse JSON |
| aoqi@0 | 45 | var weather = JSON.parse($OUT); |
| aoqi@0 | 46 | |
| aoqi@0 | 47 | // pull out humidity as array |
| aoqi@0 | 48 | var humidity = weather.list.map(function(curVal) { |
| aoqi@0 | 49 | return curVal.humidity; |
| aoqi@0 | 50 | }) |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | // Stream API to print stat |
| aoqi@0 | 53 | print("Humidity"); |
| aoqi@0 | 54 | print(Arrays["stream(int[])"](humidity).summaryStatistics()); |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | // pull maximum day time temperature |
| aoqi@0 | 57 | var temp = weather.list.map(function(curVal) { |
| aoqi@0 | 58 | return curVal.temp.max; |
| aoqi@0 | 59 | }); |
| aoqi@0 | 60 | |
| aoqi@0 | 61 | // Stream API to print stat |
| aoqi@0 | 62 | print("Max Temperature"); |
| aoqi@0 | 63 | print(Arrays["stream(double[])"](temp).summaryStatistics()); |
