object-cursor-stream

de-duped keypath stream

Example

var cursorStream = require('object-cursor-stream')
 
var cursor = cursorStream('pokemon.name')
 
cursor.write({pokemon: {type: 'chansey', name: 'Dr. Chansey'}}) // 'Dr. Chansey'
cursor.write({pokemon: {type: 'pikachu', name: 'Dr. Chansey'}}) // *nothing emitted*
cursor.write({pokemon: {type: 'pikachu', name: 'Prof. Oak'}}) // 'Prof. Oak'
cursor.write({pokemon: {type: 'pikachu'}}) // undefined
 
var cursor2 = cursorStream('pokemon.name', 'Spike')
 
cursor2.write({pokemon: {type: 'chansey', name: 'Dr. Chansey'}}) // 'Dr. Chansey'
cursor2.write({pokemon: {type: 'pikachu', name: 'Dr. Chansey'}}) // *nothing emitted*
cursor2.write({pokemon: {type: 'pikachu', name: 'Prof. Oak'}}) // 'Prof. Oak'
cursor2.write({pokemon: {type: 'pikachu'}}) // 'Spike'

API

cursorStream(keypath[, fallback]) -> DuplexStream

• keypath is a string representing a path to the data you want from the written data.
• fallback is an optional argument that will be emitted if the data at keypath is undefined.

License

This project is licensed under the Apache License, Version 2.0. See LICENSE for the full license.