com.github.lokic.javaplus

类 Predicates

java.lang.Object

com.github.lokic.javaplus.Predicates

public class Predicates
extends Object

构造器概要

构造器

构造器和说明
Predicates()

方法概要

限定符和类型	方法和说明
static <T> java.util.function.Predicate<T>	distinctByKey(java.util.function.Function<? super T,?> keyExtractor) 基于 keyExtractor, 来进行去重，只保存第一个值，之后的都忽略。
static <T> java.util.stream.Stream<T>	dropWhile(java.util.stream.Stream<T> stream, java.util.function.Predicate<? super T> predicate) 抛弃数据，直到predicate为false stream : "1", "2", "3", "", "5", "6" predicate: isNotEmpty result: "", "5", "6"
static <T> java.util.stream.Stream<T>	takeWhile(java.util.stream.Stream<T> stream, java.util.function.Predicate<? super T> predicate) 获取数据，直到predicate为false stream : "1", "2", "3", "", "5", "6" predicate: isNotEmpty result: "1", "2", "3"

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

Predicates

public Predicates()

方法详细资料

distinctByKey

public static <T> java.util.function.Predicate<T> distinctByKey(java.util.function.Function<? super T,?> keyExtractor)

基于 keyExtractor, 来进行去重，只保存第一个值，之后的都忽略。

建议在串行环境中执行该函数，并行环境中保存下的数据没法保证。

takeWhile

public static <T> java.util.stream.Stream<T> takeWhile(java.util.stream.Stream<T> stream,
                                                       java.util.function.Predicate<? super T> predicate)

获取数据，直到predicate为false

stream : "1", "2", "3", "", "5", "6" predicate: isNotEmpty result: "1", "2", "3"

类型参数:

T -

参数:

stream -

predicate -

返回:

dropWhile

public static <T> java.util.stream.Stream<T> dropWhile(java.util.stream.Stream<T> stream,
                                                       java.util.function.Predicate<? super T> predicate)

抛弃数据，直到predicate为false

stream : "1", "2", "3", "", "5", "6" predicate: isNotEmpty result: "", "5", "6"

类型参数:

T -

参数:

stream -

predicate -

返回: