Node line reader example

liner.js

var stream = require('stream')
var liner = new stream.Transform({objectMode: true})

liner._transform = function(chunk, encoding, done){
	var data = chunk.toString();
	if (this._lastLineData){ 
		data = this._lastLineData + data;
	}
	
	var lines = data.split('\n');
	this._lastLineData = lines.splice(lines.length-1, 1)[0];
	
	lines.forEach(this.push.bind(this));
	done();
};

liner._flush = function(done){
	if (this._lastLineData){
		this.push(this._lastLineData);
	}

	this._lastLineData = null;
	done();	
}

module.exports = liner