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- package com.zooplus.stock.data;
- import java.util.List;
- import java.util.stream.Stream;
- import static java.util.stream.Collectors.toList;
- import static java.util.stream.Stream.concat;
- /**
- * Created by miguel on 01.04.15.
- */
- public class Quicksort {
- public List<Integer> sort(List<Integer> input) {
- if (input.size() <= 1) return input;
- else {
- Integer pivot = input.get(input.size() / 2);
- return sort(concat(concat(input.stream().filter(i -> i.compareTo(pivot) == -1),
- input.stream().filter(i -> i.equals(pivot))),
- input.stream().filter(i -> i.compareTo(pivot) == 1)).collect(toList()));
- }
- }
- }
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