回答編集履歴
1
finalの付け忘れ
test
CHANGED
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@@ -90,7 +90,9 @@
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public static Long checkAndDelSeparate(List<String> list) {
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final long count =
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list.stream().filter((str) -> str.startsWith("h")).count();
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list.replaceAll((str) -> str.startsWith("h") ? str.substring(1) : str);
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@@ -104,55 +106,59 @@
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public static Long checkAndDelOnce(List<String> list) {
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SimpleImmutableEntry<Long, List<String>> result =
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(
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final
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final
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.co
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(a,
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S
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.
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)
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final SimpleImmutableEntry<Long, List<String>> result =
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list.stream().reduce(
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new SimpleImmutableEntry<Long, List<String>>(
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new Long(0), Collections.emptyList()),
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(acc, str)
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-> {
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final Long accCount = acc.getKey();
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final Stream<String> accStream = acc.getValue().stream();
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final BiFunction<Boolean, String,
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SimpleImmutableEntry<Long, List<String>>>
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createPair = (incr, s)
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-> new SimpleImmutableEntry<Long, List<String>>(
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incr ? accCount : accCount + 1,
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Stream.concat(accStream, Stream.of(s))
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.collect(Collectors.toList()));
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return str.startsWith("h")
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? createPair.apply(true, str.substring(1))
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: createPair.apply(false, str);
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},
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(a, b)
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-> new SimpleImmutableEntry<Long, List<String>>(
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a.getKey() + b.getKey(),
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Stream.concat(a.getValue().stream(), b.getValue().stream())
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.collect(Collectors.toList()))
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);
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final Iterator<String> itr = result.getValue().iterator();
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