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License: Creative Commons Zero v1.0 Universal
30 seconds to collect useful Java 8 snippet.
License: Creative Commons Zero v1.0 Universal
lists.stream().collect(collectingAndThen(toCollection(() -> new TreeSet<>(Comparator.comparing(o -> Rmap.getStr(o,"orderId")))),
ArrayList::new));
翻译的很好,请求转载。
/**
* 把 sourceList 的一些属性合并到 targetList 中
* 基于 testFunction 的条件,合入逻辑实现为 biConsumer
* @param targetList
* @param sourceList
* @param testFunction
* @param biConsumer
* @param <T>
* @param <S>
*/
public static <T, S> void merge(List<T> targetList, List<S> sourceList,
BiFunction<? super T, ? super S,Boolean> testFunction,
BiConsumer<? super T, ? super S> biConsumer) {
targetList.forEach((t)->{
Optional<S> optional = sourceList.stream().filter(s -> testFunction.apply(t,s)).findFirst();
if (optional.isPresent()) {
biConsumer.accept(t,optional.get());
}
});
}
别致大佬,那个chuck函数好像有点小问题?
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