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查询Tags标签: keyExtractor,共有 3条记录-
Stream 去重方法引用
/*** 过滤接口函数** @param keyExtractor 属性引用* @param <T> 属性引用泛型* @return Predicate 函数接口*/ public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {Set<Object> seen = Conc…
2022/4/12 23:20:27 人评论 次浏览 -
java8 利用 ConcurrentHashMap list根据 某个属性 去重
//自定义方法private static <T> Predicate<T> distinctByKey(Function<? super T, Object> keyExtractor) {Map<Object, Boolean> seen = new ConcurrentHashMap<>();return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TR…
2021/9/24 17:12:42 人评论 次浏览 -
java8 利用 ConcurrentHashMap list根据 某个属性 去重
//自定义方法private static <T> Predicate<T> distinctByKey(Function<? super T, Object> keyExtractor) {Map<Object, Boolean> seen = new ConcurrentHashMap<>();return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TR…
2021/9/24 17:12:42 人评论 次浏览