Is there a way to insert data?

[sanjacob]

Sorry, first time using this library, just wanted to know if there is a way to insert additional data, say in a streamArray().
The documentation makes it clear how to filter/modify items, but I cannot find info on inserting additional entries.

[uhop]

Just use stream-chain, which is the only dependency of stream-json (a sketch):

const {chain} = require('stream-chain');

const pipeline = chain([
  fs.createReadStream('data.json.gz'),
  zlib.createGunzip(),
  parser(),
  streamArray(),
  function* ({key, value}) {
    if (key % 2 == 1) yield 123;
    yield 'qwerty';
    yield {key, value: value + 42};
   // and so on
  }
]);

Imagination is the only limit.

Two notes:

• Do not pass down the pipe naked falsy values. Just in case. I usually wrap them like that: [null] or {value: null}.
• stream-chain used by this package is 2.x (no need to import it explicitly). The newly released version of stream-chain is 3.x. Its wiki clearly separates 2.x from 3.x docs.

[sanjacob]

Thank you!