[RxJS] Transformation operators: debounce and debounceTime
Debounce and debounceTime operators are similar to delayWhen and delay, with the difference that they may drop some emissions. This lesson teaches you how debounce works and where is it useful, for instance when building a type-ahead UI.
debounceTime(number): wait for number millionseconds sclience:
var foo = Rx.Observable.interval(100).take(5); /*
--0--1--2--3--4|
debounceTime(1000) // delay
------------------------4|
*/ var result = foo.debounceTime(1000); result.subscribe(
function (x) { console.log('next ' + x); },
function (err) { console.log('error ' + err); },
function () { console.log('done'); },
); /*
"next 4"
"done"
*/
var foo = Rx.Observable.interval(100).take(5); /*
--0--1--2--3--4|
debounceTime(50) // delay
----0--1--2--3--4|
*/ var result = foo.debounceTime(50); result.subscribe(
function (x) { console.log('next ' + x); },
function (err) { console.log('error ' + err); },
function () { console.log('done'); },
); /*
"next 0"
"next 1"
"next 2"
"next 3"
"next 4"
"done"
*/
debounce( () => Observable):
var foo = Rx.Observable.interval(100).take(5); /*
--0--1--2--3--4|
debounceTime(1000) // delay
------------------------4|
*/ var result = foo.debounce(() =>
Rx.Observable.interval(1000).take(1)
); result.subscribe(
function (x) { console.log('next ' + x); },
function (err) { console.log('error ' + err); },
function () { console.log('done'); },
); /*
"next 4"
"done"
*/
[RxJS] Transformation operators: debounce and debounceTime的更多相关文章
- [RxJS] Transformation operators: delay and delayWhen
This lessons teaches about delay and delayWhen: simple operators that time shift. delay(number | dat ...
- [RxJS] Filtering operators: throttle and throttleTime
Debounce is known to be a rate-limiting operator, but it's not the only one. This lessons introduces ...
- [RxJS] Transformation operator: repeat
Operator repeat() is somewhat similar to retry(), but is not for handling operators. In this lesson ...
- [RxJS] Transformation operator: scan
All of the combination operators take two or more observables as input. These operators may also be ...
- [RxJS] Filtering operators: takeLast, last
Operators take(), skip(), and first() all refer to values emitted in the beginning of an Observable ...
- [RxJS] Filtering operators: take, first, skip
There are more operators in the filtering category besides filter(). This lesson will teach how take ...
- [RxJS] Creation operators: interval and timer
It is quite common to need an Observable that ticks periodically, for instance every second or every ...
- [RxJS] Creation operators: empty, never, throw
This lesson introduces operators empty(), never(), and throw(), which despite being plain and void o ...
- Rxjs常用operators
本文使用的是angular6内置的rxjs,版本号为6.3.3 concat 通过顺序地发出多个 Observables 的值将它们连接起来,一个接一个的. 参数: 名称 类型 属性 描述 other ...
随机推荐
- 帝国cms7.0跳过[会员注册类型]这步的方法
改 e/config/config.php 文件,把$ecms_config['member']['changeregisterurl']="ChangeRegister.php" ...
- 【转载】HRTF音频3D定位技术综述
1. 序 您一定有过这样的经验:在一个炎热的夏夜,讨厌的蚊子在你的耳边飞舞.此时,没有比除掉这个祸害更急所的了,对吧?做到这一点,不必睁大了眼去找蚊子,只需依靠敏锐的听力,一样可以确定蚊子的方位,在漆 ...
- 《agile java》First : 起步 + 章节练习题
第一章节:起步 1.创建简单Java类2.创建测试类3.使用JUnit4.学习构造函数5.重构代码 涉及知识:TDD.UML TDD: Test Driven Development, 测试驱动开发. ...
- hduoj 1077 Catching Fish 求单位圆最多覆盖点个数
Catching Fish Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)To ...
- C API向MySQL插入批量数据的快速方法——关于mysql_autocommit
MySQL默认的数据提交操作模式是自动提交模式(autocommit).这就表示除非显式地开始一个事务,否则每个查询都被当做一个单独的事务自动执行.我们可以通过设置autocommit的值改变是否是自 ...
- [cocos2d] 调用动画方法
利用texture atlases生成动画 中讲到如何添加动画,如果想要调用已添加的动画怎么办? 在1.0.1版本以前的cocos2d添加动画的方法为: CCAnimation *anim = [CC ...
- hadoop单机安装
1.解压hadoop-1.0.3-bin.tar.gz放到指定目录下. 2.安装java环境,参照文档 3.Ssh无密登录 4.修改conf下四个文件 Hadoop-env.sh: export JA ...
- bzoj1819
水题,上trie,然后穷举每一位的时候判定一下三种编辑 ..*,..] of longint; v:..*] of longint; d:..] of boolean; s:string; t,i,l ...
- 传智播客C语言视频第一季(有效下载期为10.1-10.7,10.8关闭)
J:\传智播客_尹成_C语言从菜鸟到高手├─传智播客_尹成_C语言从菜鸟到高手_第一章C语言概述A│ 第一讲1.1C语言第一阶段.mp4│ 第二讲1.2c语言入门教程.mp4 ...
- Spark使用CombineTextInputFormat缓解小文件过多导致Task数目过多的问题
目前平台使用Kafka + Flume的方式进行实时数据接入,Kafka中的数据由业务方负责写入,这些数据一部分由Spark Streaming进行流式计算:另一部分数据则经由Flume存储至HDFS ...