fastrx

#rx4rx-fast the fast rxjs implemention

#install

npm i fastrx

#usage

import rx from 'fastrx';

rx.of(1,2,3).filter(x=>x<2).subscribe(console.log)

or

with tree-shaking

import {pipe,fromArray,filter,subscribe} from 'fastrx/pipe';
pipe(fromArray([1,2,3]), filter(x=>x<2), subscribe(console.log))

with "@babel/plugin-proposal-pipeline-operator"

import {fromArray,filter,subscribe} from 'fastrx/pipe';
fromArray([1,2,3]) |> filter(x=>x<2) |> subscribe(console.log)

dataflow for 1000000 source events

lib	op/s	samples
rx4rx-lite	11.29 op/s ± 1.47%	(56 samples)
rx4rx-fast	22.56 op/s ± 1.77%	(57 samples)
cb-basics	9.56 op/s ± 1.73%	(49 samples)
xstream	5.37 op/s ± 0.68%	(30 samples)
most	17.32 op/s ± 1.93%	(82 samples)
rx 6	6.28 op/s ± 3.10%	(35 samples)

---

#extensible

Observable.create way

import rx from 'fastrx';
const myObservable = rx(sink=>{
    sink.next('data')
    sink.complete()
})
myObservable.subscribe(console.log)

or

import {pipe,subscribe} from 'fastrx/pipe';
const myObservable = ()=>sink=>{
    sink.next('data')
    sink.complete()
}
pipe(myObservable(), subscribe(console.log))

add to library

import rx from 'fastrx';
rx.myObservable = (args) => sink => {
    const id = setTimeout(()=>{
        sink.next(args)
        sink.complete()
    })
    sink.defer([clearTimeout,null,id])
    //or sink.defer(()=>clearTimeout(id))
}

then you can use your observable anywhere

import rx from 'fastrx';
rx.myObservable('something').subscribe(console.log)

vue2.0 usage

import rx from "fastrx";
import RxComputed from "fastrx/vue";
Vue.use(RxComputed);

<template>
    <div @click="onClick1" :style="{top:y+'px',left:x+'px'}">
        <span>{{test1}}</span>
        <span>{{test0}}</span>
    </div>
</template>
<script>
import rx from 'fastrx'
export default {
   rxComputed:{
       test0:()=>rx.interval(1000).take(10),//简单的订阅
       test_watch:{//使用watch触发Observable发射数据
           get:ob=>ob.switchMapTo(rx.interval(1000)).map(x=>10-x)
           watch:"test1"
       },
       test1:{//使用设置方法的方式触发，可以提供给事件回调
           get:ob=>ob.switchMap(rx.timer(1000)),
           handler:"onClick1"
       },
       test2:{
           call:true,//调用test2方法而不是设置属性
           get:ob=>ob.switchMap(e=>rx.timer(1000).map(()=>e)),
           handler:"onClick1"
       },
       "x,y":{//采用解构，将结果对象中的x,y属性分别写入vue实例中的x和y属性
            get:ob=>ob.switchMap(e=>rx.timer(1000).map(()=>({x:e.screenX,y:e.screenY}))),
           handler:"onClick1",
           default:{x:0,y:0}//设置默认值
        }
   },
   methods:{
       test2(e){
           console.log(e)
       }
   }
}
</script>

vue3.0 usage

<template>
    <div @click="handler"></div>
    <div>{{count}}</div>
    <div>{{count2}}</div>
</template>
<script>
import rx from 'fastrx'
export default {
    setup(){
        const ob = rx.eventHandler()
        const count =  ob.switchMapTo(rx.interval(1000)).toRef()
        const count2 = rx.watch(count).map(x=>x*2).toRef()
        return {handler:ob.handler,count,count2}
    }
}
</script>