1 #// usage: jjs -scripting weather.js
   2 
   3 /*
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  31  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  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());