CSV Reader in nodeJS

gistfile1.txt

var fs=require('fs');
var lazy = require("lazy")
function CSVReader(linesToSkip,separator,convertKeyFunction){
	if(!linesToSkip){
		linesToSkip=0;
	}
	if(!separator){
		separator=';';
	}
	this._linesToSkip=linesToSkip;
	this._separator=separator;
	this._convertKeyFunction=convertKeyFunction;
}
CSVReader.prototype.readFile=function(fileName){
	var self=this;
	var count=0;
	var keys;
	var data;
	var lines=[];
	var ret=[];
	var length;
	fs.readFileSync(fileName).toString().split('\n').forEach(function(line){
			if(line){
				line=line.replace('\r','');
				data=line.split(self._separator);
				if(count==self._linesToSkip){
					//é um header
					keys=data;
					length=data.length;
					if(self._convertKeyFunction){
						for(var i=0;i<length;i++){
							keys[i]=self._convertKeyFunction(keys[i]);
						}
					}
				}
				else if(count>self._linesToSkip){
					var obj={};
					for(var i=0;i<length;i++){
						obj[keys[i].toString()]=data[i];
					}
					ret.push(obj);
				}
				count++;
			}
	});
	return ret;
}
module.exports=CSVReader;