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varint

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varint

protobuf-style varint bytes - use msb to create integer values of varying sizes


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What is varint?

The varint npm package is used for encoding and decoding variable-length integers. It is particularly useful in scenarios where you need to efficiently store or transmit integers that can vary greatly in size, such as in network protocols or file formats.

What are varint's main functionalities?

Encoding Integers

This feature allows you to encode an integer into a variable-length format. The encoded result is an array of bytes.

const varint = require('varint');
const encoded = varint.encode(300); // [172, 2]
console.log(encoded);

Decoding Integers

This feature allows you to decode a variable-length encoded integer back into its original integer form.

const varint = require('varint');
const decoded = varint.decode([172, 2]); // 300
console.log(decoded);

Encoding Integers to Buffer

This feature allows you to encode an integer directly into a Buffer, which can be useful for more advanced use cases involving binary data.

const varint = require('varint');
const buffer = Buffer.alloc(10);
const bytesWritten = varint.encode(300, buffer, 0); // 2
console.log(buffer.slice(0, bytesWritten));

Decoding Integers from Buffer

This feature allows you to decode an integer from a Buffer, which is useful when working with binary data streams.

const varint = require('varint');
const buffer = Buffer.from([172, 2]);
const decoded = varint.decode(buffer); // 300
console.log(decoded);

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Package last updated on 28 Sep 2020

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