rxdable
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3.0.1 • Public • Published

rxdable

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Utility lib to work with Node.js streams and Rx.js.

  • Node.js >= 10.x
  • Rx.js 6.x
  • Zero dependencies
  • TypeScript support

Observable to Readable stream

const { getStreamByObservable } = require("rxdable")
 
const readableStream = getStreamByObservable(observable)

Readable stream to Observable

const { createReadStream } = require("fs")
const { subscribeToStream } = require("rxdable")
const { Observable } = require("rxjs")
 
function fileRead(file, encoding = "utf8") {
  return new Observable(subscriber => {
    return subscribeToStream(createReadStream(file, encoding), subscriber)
  })
}

Readable stream to Observable (faster way)

const { getObservableByStream } = require("rxdable")
 
const observable = getObservableByStream(readableStream)

WARNING: This function will create an Observable ables to be subscribed just one time.

Operator to Transform stream

const { count } = require("rxjs/operators")
const { getStreamByOperator } = require("rxdable")
 
const countStream = getStreamByOperator(count())

Multiple operators are supported:

const { map } = require("rxjs/operators")
const { getStreamByOperator } = require("rxdable")
 
const firstUppercasedLetterStream = getStreamByOperator(
  map(value => value.toString()),
  map(value => value.substr(0, 1)),
  map(value => value.toUpperCase())
)

Passthrough (no operators) is supported:

const { getStreamByOperator } = require("rxdable")
 
const passthroughStream = getStreamByOperator()

Writable/Duplex/Transform stream to operator

const { createWriteStream } = require("fs")
const { pipeObservableToStream } = require("rxdable")
const { Observable } = require("rxjs")
 
function fileWrite(file, encoding = "utf8") {
  return observable => {
    return new Observable(subscriber => {
      return pipeObservableToStream(
        observable,
        createWriteStream(file, encoding),
        subscriber
      )
    })
  }
}

Writable/Duplex/Transform stream to operator (faster way)

const { getOperatorByStream } = require("rxdable")
 
const operator = getOperatorByStream(transformStream)

WARNING: This function will create an Operator ables to be used just one time.

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npm i rxdable

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Version

3.0.1

License

MIT

Unpacked Size

16 kB

Total Files

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Collaborators

  • greguz