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1.新增NonNull(Function)、mapNonNull(Function);

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2.flatMapIter名称修改为flatIter;
3.flatMap和flatIter主动过滤null元素;
This commit is contained in:
Zjp
2022-08-09 11:36:20 +08:00
parent f17b0a4166
commit c5fa258079
2 changed files with 48 additions and 8 deletions
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13
hutool-core/src/test/java/cn/hutool/core/stream/FastStreamTest.java
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@@ -186,12 +186,19 @@ public class FastStreamTest {
}
@Test
public void testFlatMapIter() {
public void testFlatIter() {
List<Integer> list = Arrays.asList(1, 2, 3);
List<Integer> flatMapIter = FastStream.of(list).<Integer>flatMapIter(e -> null).toList();
// 一个元素 扩散为 多个元素(迭代器)
List<Integer> flatMapIter = FastStream.of(list).flatIter(e -> Arrays.asList(e, e * 10)).toList();
Assert.assertEquals(ListUtil.of(1, 10, 2, 20, 3, 30), flatMapIter);
// 过滤迭代器为null的元素
flatMapIter = FastStream.of(list).<Integer>flatIter(e -> null).toList();
Assert.assertEquals(Collections.emptyList(), flatMapIter);
flatMapIter = FastStream.of(list).flatMapIter(e -> Arrays.asList(e, e * 10)).toList();
// 自动过滤null元素
flatMapIter = FastStream.of(list).flatIter(e -> Arrays.asList(e, null)).toList();
Assert.assertEquals(ListUtil.of(1, 10, 2, 20, 3, 30), flatMapIter);
// 不报npe测试
Assert.assertTrue(FastStream.of(list).flatMapIter(e -> null).isEmpty());