Created
November 30, 2017 04:41
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Imperative vs functional get even numbers
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package com.amazon.pq.listingviolationreview.common; | |
import com.google.common.collect.ImmutableList; | |
import java.util.ArrayList; | |
import java.util.List; | |
public class Test { | |
public static List<Integer> evenNumbers(List<Integer> integers) { | |
List<Integer> result = new ArrayList<>(); | |
for (Integer i : integers) { | |
if (i % 2 == 0) { | |
result.add(i); | |
} | |
} | |
return result; | |
} | |
public static List<Integer> evenNumbers(List<Integer> integers) { | |
return integers.stream() | |
.filter(i -> i % 2 == 0) | |
.collect(ImmutableList.toImmutableList()); | |
} | |
} |
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