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TylorS/esnextbin.md

Last active Jun 3, 2017
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esnextbin sketch
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>ESNextbin Sketch</title>
<!-- put additional styles and scripts here -->
</head>
<body>
<!-- put markup and other contents here -->
</body>
</html>
import { runEffects, tap, fromPromise, periodic, constant, scan } from '@most/core'
import { newDefaultScheduler } from '@most/scheduler'
class Just {
constructor (value) {
this.value = value
}
next() {
return { value: this.value, done: true }
}
}
class Map {
constructor (f, iterable) {
this.f = f
this.iterable = iterable
}
next() {
const { f, iterable } = this
const { value, done } = iterable.next()
return { value: f(value), done }
}
}
class Sample {
constructor (f, stream, behavior) {
this.f = f
this.stream = stream
this.behavior = behavior
}
run(sink, scheduler) {
const { f, stream, behavior } = this
return stream.run(new SampleSink(f, behavior, sink), scheduler)
}
}
class SampleSink {
constructor (f, behavior, sink) {
this.f = f
this.behavior = behavior
this.sink = sink
}
event(t, x) {
const { f, behavior, sink } = this
const { value } = behavior.next()
sink.event(t, f(value, x))
}
error (t, e) {
this.sink.error(t, e)
}
end (t) {
this.sink.end(t)
}
}
// Example
const scheduler = newDefaultScheduler()
const drain = stream => runEffects(stream, scheduler)
const observe = (f, stream) => drain(tap(f, stream))
const just = x => new Just(x)
const map = (f, iterable) => new Map(f, iterable)
const sample = (f, behavior, stream) => new Sample(f, stream, behavior)
const behavior = map((x) => x + 1, just(100))
const add = (x, y) => x + y
const sampler= scan(add, 0, constant(1, periodic(100)))
const stream = sample(add, behavior, sampler)
observe(console.log, stream)
{
"name": "esnextbin-sketch",
"version": "0.0.0",
"dependencies": {
"@most/core": "0.3.1",
"@most/scheduler": "0.4.0",
"babel-runtime": "6.22.0"
}
}
'use strict';
var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');
var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
var _createClass2 = require('babel-runtime/helpers/createClass');
var _createClass3 = _interopRequireDefault(_createClass2);
var _core = require('@most/core');
var _scheduler = require('@most/scheduler');
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var Just = function () {
function Just(value) {
(0, _classCallCheck3.default)(this, Just);
this.value = value;
}
(0, _createClass3.default)(Just, [{
key: 'next',
value: function next() {
return { value: this.value, done: true };
}
}]);
return Just;
}();
var Map = function () {
function Map(f, iterable) {
(0, _classCallCheck3.default)(this, Map);
this.f = f;
this.iterable = iterable;
}
(0, _createClass3.default)(Map, [{
key: 'next',
value: function next() {
var f = this.f;
var iterable = this.iterable;
var _iterable$next = iterable.next();
var value = _iterable$next.value;
var done = _iterable$next.done;
return { value: f(value), done: done };
}
}]);
return Map;
}();
var Sample = function () {
function Sample(f, stream, behavior) {
(0, _classCallCheck3.default)(this, Sample);
this.f = f;
this.stream = stream;
this.behavior = behavior;
}
(0, _createClass3.default)(Sample, [{
key: 'run',
value: function run(sink, scheduler) {
var f = this.f;
var stream = this.stream;
var behavior = this.behavior;
return stream.run(new SampleSink(f, behavior, sink), scheduler);
}
}]);
return Sample;
}();
var SampleSink = function () {
function SampleSink(f, behavior, sink) {
(0, _classCallCheck3.default)(this, SampleSink);
this.f = f;
this.behavior = behavior;
this.sink = sink;
}
(0, _createClass3.default)(SampleSink, [{
key: 'event',
value: function event(t, x) {
var f = this.f;
var behavior = this.behavior;
var sink = this.sink;
var _behavior$next = behavior.next();
var value = _behavior$next.value;
sink.event(t, f(value, x));
}
}, {
key: 'error',
value: function error(t, e) {
this.sink.error(t, e);
}
}, {
key: 'end',
value: function end(t) {
this.sink.end(t);
}
}]);
return SampleSink;
}();
// Example
var scheduler = (0, _scheduler.newDefaultScheduler)();
var drain = function drain(stream) {
return (0, _core.runEffects)(stream, scheduler);
};
var observe = function observe(f, stream) {
return drain((0, _core.tap)(f, stream));
};
var just = function just(x) {
return new Just(x);
};
var map = function map(f, iterable) {
return new Map(f, iterable);
};
var sample = function sample(f, behavior, stream) {
return new Sample(f, stream, behavior);
};
var behavior = map(function (x) {
return x + 1;
}, just(100));
var add = function add(x, y) {
return x + y;
};
var sampler = (0, _core.scan)(add, 0, (0, _core.constant)(1, (0, _core.periodic)(100)));
var stream = sample(add, behavior, sampler);
observe(console.log, stream);
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