编写工具类 public class DistinctUtil { public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) { Map<Object, Boolean> seen = new ConcurrentHashMap<>(); return t -> seen.putIfAbsent(keyExtractor.apply(t
Ajax请求中的async:false/true的作用 官方的解释是:http://api.jquery.com/jQuery.ajax/ async Boolean Default: true By default, all requests are sent asynchronous (e.g. this is set to true by default). If you need synchronous requests, set this option to false. Note t
Ajax请求中的async:false/true的作用 官方的解释是:http://api.jquery.com/jQuery.ajax/ async Boolean Default: true By default, all requests are sent asynchronous (e.g. this is set to true by default). If you need synchronous requests, set this option to false. Note t