How to use the BufferListStream function from bl

Bl.BufferListStream is a Node.js module that allows for the creation and manipulation of a stream of data buffers.

How does bl.BufferListStream work?

Bl.BufferListStream works by maintaining a list of data buffers as they are streamed, allowing for efficient manipulation of data in memory. As data is streamed into the BufferListStream, it is added to the end of the list. The BufferListStream can then perform operations on this list of buffers, such as concatenation or slicing, without the need for expensive memory copies or reallocations. BufferListStream can also be used to pause and resume streaming of data, and to handle backpressure in cases where the rate of data production exceeds the rate of data consumption. BufferListStream is often used in Node.js applications that involve streaming data from multiple sources, such as network sockets or file streams, and need to efficiently manipulate this data in memory.

Ai Example

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const bl = require("bl");
const fs = require("fs");

// Create a new BufferListStream object
const bufferStream = new bl.BufferListStream();

// Read data from a file stream and pipe it to the BufferListStream
fs.createReadStream("myFile.txt").pipe(bufferStream);

// When the BufferListStream has finished receiving data, perform some operation on it
bufferStream.on("end", function () {
  const data = bufferStream.slice(0, 10); // Slice the first 10 bytes of data
  console.log(data.toString()); // Output the sliced data to the console
});

In this example, we create a new Bl.BufferListStream object (bufferStream) and pipe data from a file stream to it using the pipe() method. When the file stream has finished streaming data to the BufferListStream, we use the slice() method to extract the first 10 bytes of data from the stream. Finally, we output this sliced data to the console using the toString() method. Note that because Bl.BufferListStream efficiently manages the data in memory, we can manipulate it without the need for expensive memory copies or reallocations.