var union = require('./') var from = require('from2') var sorted1 = from.obj([{key: 'a'}, {key: 'b'}, {key: 'c'}]) var sorted2 = from.obj([{key: 'b'}, {key: 'd'}]) var u = union(sorted1, sorted2) u.on('data', function (data) { console.log(data) }) u.on('end', function () { console.log('no more data') })