nanocursor

nanocursor

Small cursor abstraction that can seek, go forward, and go backwards.

npm install nanocursor

Usage

const Nanocursor = require('nanocursor')

const cursor = new Nanocursor({
  seek (pos, cb) {
    // should seek to pos
    cb(null)
  },
  next (cb) {
    // read the next item and return it
    cb(null, ...)
  },
  prev (cb) {
    // read the prev item and return it
    cb(null, ...)
  }
})

API

cursor = new Cursor([options])

Make a new cursor. Optionally pass in seek, next, prev as the implementation for the those corresponding calls.

cursor.seek(position, [callback])

Seek the cursor.

cursor._seek(position, callback)

Override this method to add seek logic. Only one _prev, _next, or _seek call will be active at the time.

cursor.next(callback)

Get the next cursor item.

cursor._next(callback)

Override this method to add next logic. Only one _prev, _next, or _seek call will be active at the time.

cursor.prev(callback)

Get the prev cursor item.

cursor._prev(callback)

Override this method to add prev logic. Only one _prev, _next, or _seek call will be active at the time.

License

MIT