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FPNumberRunner.java
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package com.in28minutes.functionalprogramming;
import java.util.List;
public class FPNumberRunner {
public static void main(String[] args) {
List<Integer> numbers = List.of(4,6,8,13,3,15);
//Exercise - Print squares of first 10 numbers!
//Clue - IntStream.range(1,10)
//List.of("Apple", "Ant", "Bat").stream()
//Map all of these to lowercase and print them
//List.of("Apple", "Ant", "Bat").stream()
//Print the length of each element
/*
numbers.stream()
.forEach( element ->System.out.println(element));*/
int sum = fpSum(numbers);
System.out.println(sum);
}
private static int fpSum(List<Integer> numbers) {
return numbers.stream()
.reduce(0,
(number1, number2) -> number1 + number2);
}
private static int normalSum(List<Integer> numbers) {
int sum = 0;
for(int number:numbers) {
sum += number;
}
return sum;
}
}