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Hayes
31 Jan 2017
1const { Readable } = require("stream")
2
3const readable = Readable.from(["input string"])
4
5readable.on("data", (chunk) => {
6  console.log(chunk) // will be called once with `"input string"`
7})
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Théophile
10 Jan 2020
1A stream is an abstract interface for working with streaming data in Node.js. The stream module provides an API for implementing the stream interface.
2
3There are many stream objects provided by Node.js. For instance, a request to an HTTP server and process.stdout are both stream instances.
4
5Streams can be readable, writable, or both. All streams are instances of EventEmitter.
6
7To access the stream module
8
9const stream = require('stream');
10or import stream from 'stream';
11
12There are four fundamental stream types within Node.js:
13Writable: streams to which data can be written (for example, fs.createWriteStream()).
14Readable: streams from which data can be read (for example, fs.createReadStream()).
15Duplex: streams that are both Readable and Writable (for example, net.Socket).
16Transform: Duplex streams that can modify or transform the data as it is written and read (for example, zlib.createDeflate()).
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