RxJS 系列 – Filtering Operators】的更多相关文章

There are more operators in the filtering category besides filter(). This lesson will teach how take(), first(), and skip() are simply operators to ignore or pass a certain amount of events from the source Observable.  take(number): var foo = Rx.Obse…
Operator distinct() and its variants are an important type of Filtering operator. This lessons shows how they work and in what cases are they useful. distinctUntilChanged(): var foo = Rx.Observable.interval(500).take(5) .zip(Rx.Observable.of('a','b',…
Operators take(), skip(), and first() all refer to values emitted in the beginning of an Observable execution. In this lesson we will see similar operators which refer instead to the end of an Observable execution, such as takeLast(). takeLast(number…
Debounce is known to be a rate-limiting operator, but it's not the only one. This lessons introduces you to throttleTime and throttle, which only drop events (without delaying them) to accomplish rate limiting.  throttleTime(number): first emits, the…
After takeUntil() and takeWhile() function, let's have a look on skipWhile() and skilUntil() functions. SkipWhile(predicate: function): Skip the value if meet the predicate function. var foo = Rx.Observable.interval(1000); /* --0--1--2--3--4--5--6--7…
take(), takeLast(), first(), last(), those opreators all take number or no param. takeUtil and takeWhile will take Observalbe and function. takeUntil(notifier: Observable): Stop when another observalbe happens var foo = Rx.Observable.interval(1000);…
转:http://www.cnblogs.com/lifepoem/archive/2011/11/16/2250676.html 在本系列博客前面的篇章中,已经对LINQ的作用.C# 3.0为LINQ提供的新特性,还有几种典型的LINQ技术:LINQ to Objects.LINQ to SQL.Entity Framework进行了比较详细的介绍,至此,我们应该了解了各种LINQ技术之间的联系和区别.千里之行始于足下,这些基础理论是理解和使用LINQ 的关键.但是我们在前面的文章中对于LIN…
在本系列博客前面的篇章中,已经对LINQ的作用.C# 3.0为LINQ提供的新特性,还有几种典型的LINQ技术:LINQ to Objects.LINQ to SQL.Entity Framework进行了比较详细的介绍,至此,我们应该了解了各种LINQ技术之间的联系和区别.千里之行始于足下,这些基础理论是理解和使用LINQ的关键.但是我们在前面的文章中对于LINQ查询运算符(LINQ Operators)并没有完整的介绍,这就是接下来这几篇博客中所要做的工作.大家可以按顺序依次对各个LINQ…
调度器 什么是调度器?调度器是当开始订阅时,控制通知推送的.它由三个部分组成. 调度是数据结构.它知道怎样在优先级或其他标准去存储和排队运行的任务 调度器是一个执行上下文.它表示任务在何时何地执行(例如,立即或是在回调机制中如 setTimeout 或 process.nextTick,又或是动画框架) 调度器有一个(虚拟)计时器.它提供一个 "时间" 的概念,通过在调度器的方法 now() .在特定的调度程序上调度,它只遵循计时器表示的时间. 调度器能让你在执行上下文定义 Obser…
首先是 Observable 和promise的区别, 1返回值个数,Observable 可以返回0到无数个值. 2.Promise主动推送,控制着"值"何时被 "推送 "到回调函数. Observable 被动,没有被订阅的时候,它就什么也不做,而且,它既可以是同步的,又可以是异步的. import { Observable } from 'rxjs'; const foo = new Observable(subscriber => { console.…