level-concat-iterator

level-concat-iterator

Concatenate entries from an iterator into an array.

Usage

const concat = require('level-concat-iterator')
const level = require('level')

const db = level('./db')

db.put('foo', 'bar', function (err) {
  if (err) throw err

  concat(db.iterator(), function (err, entries) {
    if (err) throw err

    // [{ key: 'foo', value: 'bar' }]
    console.log(entries)
  })
})

With promises:

await db.put('foo', 'bar')
const entries = await concat(db.iterator())

If you are upgrading: please see UPGRADING.md.

API

concat(iterator[, callback])

Takes an abstract-leveldown compatible iterator as first parameter and calls the callback with an array of entries, where each entry is an object in the form { key, value }. Calls the callback with an error if iterator.next() or iterator.end() errors. If no callback is provided, a promise is returned.

Contributing

Level/concat-iterator is an OPEN Open Source Project. This means that:

Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.

See the Contribution Guide for more details.

Donate

Support us with a monthly donation on Open Collective and help us continue our work.

License

MIT

Changelog

[3.1.0] - 2021-11-04

Added

• Support promises and abstract-level (3074af8) (Vincent Weevers)