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combined-stream

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combined-stream

A stream that emits multiple other streams one after another.

  • 1.0.8
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50M
increased by6.09%
Maintainers
4
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Created

What is combined-stream?

The combined-stream npm package is used to create a stream that emits events from multiple other streams in sequence. It is useful for treating a series of streams as a single continuous stream, which can be particularly handy when dealing with file uploads, data concatenation, or stream transformation.

What are combined-stream's main functionalities?

Creating a combined stream from multiple sources

This feature allows you to combine multiple readable streams into one. In the code sample, two text files are read as streams and appended to the combined stream, which is then piped to the standard output.

const CombinedStream = require('combined-stream');
const fs = require('fs');

const combinedStream = CombinedStream.create();
combinedStream.append(fs.createReadStream('file1.txt'));
combinedStream.append(fs.createReadStream('file2.txt'));

combinedStream.pipe(process.stdout);

Appending streams with delayed execution

This feature allows you to append streams with a function that will be called when the stream is ready for more data. The code sample demonstrates appending a stream with a function that provides the stream asynchronously.

const CombinedStream = require('combined-stream');
const fs = require('fs');

const combinedStream = CombinedStream.create();
combinedStream.append(next => {
  next(fs.createReadStream('file3.txt'));
});

combinedStream.pipe(process.stdout);

Appending data directly

This feature allows you to append raw data directly to the combined stream. The code sample shows how to append string data to the stream, which is then piped to the standard output.

const CombinedStream = require('combined-stream');

const combinedStream = CombinedStream.create();
combinedStream.append('Hello ');
combinedStream.append('World!');

combinedStream.pipe(process.stdout);

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Package last updated on 12 May 2019

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