Created
September 27, 2016 08:47
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transducer sample
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const Rx = require('../../'); | |
const fs = require('fs'); | |
const t = require('transducers-js'); | |
const source = Rx.Observable.range(1, 10000); | |
const increment = x => x + 1; | |
const isEven = x => (x % 2 === 0); | |
const startTime = new Date(); | |
const transducer = t.comp(t.map(increment), t.filter(isEven)); | |
source.transduce(transducer) | |
.subscribe(console.log); | |
const endTime = new Date(); | |
console.log('time: ' + (endTime - startTime)); | |
const startTime1 = new Date(); | |
source.map(increment).filter(isEven) | |
.subscribe(console.log); | |
const endTime1 = new Date(); | |
console.log('time: ' + (endTime1 - startTime1)); | |
const startTime2 = new Date(); | |
const reducingFunc = t.toFn(transducer, (xs, x) => { | |
xs.push(x); | |
return xs; | |
}); | |
//console.log('func: ', reducingFunc.toString()); | |
const x = source.toArray().subscribe( | |
x => console.log(x.reduce(reducingFunc, [])) | |
); | |
const endTime2 = new Date(); | |
console.log('time: ' + (endTime2 - startTime2)); | |
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