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fstream

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fstream

Advanced file system stream things


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3.3M
decreased by-18.1%
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4
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What is fstream?

The fstream npm package is a Node.js module that provides advanced file system operations through readable and writable streams. It allows for reading from and writing to files in a highly efficient, streaming manner, which is particularly useful for handling large files or performing file manipulations without loading entire files into memory.

What are fstream's main functionalities?

Reading files

This feature allows you to read data from a file in chunks. The 'data' event is emitted each time a chunk of data is read from the file, making it suitable for processing large files without excessive memory usage.

const fstream = require('fstream');
const reader = fstream.Reader('path/to/file.txt');
reader.on('data', function(chunk) {
  console.log('Read some data:', chunk);
});

Writing files

This feature enables writing data to a file. You can write chunks of data to the file, and call 'end' when no more data needs to be written. This is useful for generating files on-the-fly or appending data to existing files.

const fstream = require('fstream');
const writer = fstream.Writer('path/to/output.txt');
writer.write('Hello, world!\n');
writer.end();

Piping between streams

This demonstrates the ability to pipe data directly from a readable stream to a writable stream, which is a powerful feature for efficiently transferring data without intermediate storage.

const fstream = require('fstream');
const reader = fstream.Reader('path/to/input.txt');
const writer = fstream.Writer('path/to/output.txt');
reader.pipe(writer);

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Package last updated on 15 May 2019

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