Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: samples/weather.js
samples/weather.js
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| 1 #// usage: jjs -scripting weather.js | |
| 2 | |
| 3 /* | |
| 4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * | |
| 10 * - Redistributions of source code must retain the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer. | |
| 12 * | |
| 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. | |
| 16 * | |
| 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. | |
| 20 * | |
| 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 // Simple nashorn example showing back-quote exec process, | |
| 35 // JSON and Java8 streams | |
| 36 | |
| 37 var Arrays = Java.type("java.util.Arrays"); | |
| 38 | |
| 39 // use curl to download JSON weather data from the net | |
| 40 // use backquote -scripting mode syntax to exec a process | |
| 41 | |
| 42 `curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`; | |
| 43 | |
| 44 // parse JSON | |
| 45 var weather = JSON.parse($OUT); | |
| 46 | |
| 47 // pull out humidity as array | |
| 48 var humidity = weather.list.map(function(curVal) { | |
| 49 return curVal.humidity; | |
| 50 }) | |
| 51 | |
| 52 // Stream API to print stat | |
| 53 print("Humidity"); | |
| 54 print(Arrays["stream(int[])"](humidity).summaryStatistics()); | |
| 55 | |
| 56 // pull maximum day time temperature | |
| 57 var temp = weather.list.map(function(curVal) { | |
| 58 return curVal.temp.max; | |
| 59 }); | |
| 60 | |
| 61 // Stream API to print stat | |
| 62 print("Max Temperature"); | |
| 63 print(Arrays["stream(double[])"](temp).summaryStatistics()); |
