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var Arrays = Java.type("java.util.Arrays")

// use curl to download JSON weather data from the net
var str = `curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`

// parse JSON
var weather = JSON.parse($OUT)

// pull out humidity as array
var humidity = weather.list.map(function(curVal) {
    return curVal.humidity
})

// Stream API to print stat
print("Humidity")
print(Arrays["stream(int[])"](humidity).summaryStatistics())

// pull maximum day time temperature
var temp = weather.list.map(function(curVal) {
    return curVal.temp.max
})

// Stream API to print stat
print("Max Temperature")
print(Arrays["stream(double[])"](temp).summaryStatistics())