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ldjson-stream

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ldjson-stream

streaming line delimited json parser + serializer


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287K
decreased by-2.37%
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What is ldjson-stream?

The ldjson-stream npm package is designed to handle line-delimited JSON (LDJSON) streams. It provides utilities for parsing and stringifying LDJSON data, which is useful for processing large datasets in a memory-efficient manner.

What are ldjson-stream's main functionalities?

Parsing LDJSON

This feature allows you to parse a stream of line-delimited JSON data. The code sample reads from a file named 'data.ldjson' and parses each line as a JSON object, logging each object to the console.

const ldjson = require('ldjson-stream');
const fs = require('fs');

fs.createReadStream('data.ldjson')
  .pipe(ldjson.parse())
  .on('data', obj => {
    console.log(obj);
  });

Stringifying LDJSON

This feature allows you to stringify a stream of JSON objects into line-delimited JSON format. The code sample takes an array of objects and writes them to a file named 'output.ldjson' in LDJSON format.

const ldjson = require('ldjson-stream');
const fs = require('fs');

const data = [
  { name: 'Alice', age: 30 },
  { name: 'Bob', age: 25 }
];

const writeStream = fs.createWriteStream('output.ldjson');
const stringifyStream = ldjson.serialize();

stringifyStream.pipe(writeStream);
data.forEach(item => stringifyStream.write(item));
stringifyStream.end();

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Package last updated on 12 Aug 2014

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