Proper TSV/CSV parsing. toObjects uses first line as header and converts lines into objects. sep defaults to '\t', use ',' instead for CSV.

parseXSV.js

var parseXSV = function(str, toObjects, sep) {
    if (!sep) { sep = '\t'; }

    var chars = str.split('');

    var lst = [];
    var elem = [];
    var field = [];
    var inComplexField = false;

    var c, p; // current, prev
    for (var i = 0, f = chars.length; i < f; ++i) {
        c = chars[i];

        if (c === '\r') { // this if is optional :)
            continue;
        }
        else if (!inComplexField && c === '"' && (p === undefined || p === sep || p === '\n')) {
            inComplexField = true;
        }
        else if (!inComplexField && (c === sep || c === '\n')) {
            elem.push( field.join('').replace(/""/g, '"') );
            field = [];
            if (c === '\n') {
                lst.push(elem);
                elem = [];
            }
        }
        else if (inComplexField && p === '"' && (c === sep || c === '\n')) {
            field.pop();
            elem.push( field.join('').replace(/""/g, '"') );
            field = [];
            inComplexField = false;
            if (c === '\n') {
                lst.push(elem);
                elem = [];
            }
        }
        else {
            field.push(c);
        }

        p = c;
    }

    if (!toObjects) {
        return cb(null, lst);
    }

    var names = lst.shift();
    return lst.map(function(l) {
        var o = {};
        names.forEach(function(name, idx) {
            o[name] = l[idx];
        });
        return o;
    });
};