JS Serialize

gistfile1.js

var serialize = function (obj) {
    "use strict";
    var val, vArr, vObj, i, attr;

    if (obj !== undefined) {
        switch (obj.constructor) {
        case "Array":
            vArr = "[";
            for (i = 0; i < obj.length; i += 1) {
                if (i > 0) {
                    vArr += ",";
                }
                vArr += this.serialize(obj[i]);
            }
            vArr += "]";
            return vArr;
        case "String":
            val = '"' + obj + '"';
            return val;
        case "Number":
            val = isFinite(obj) ? obj.toString() : null;
            return val;
        case "Date":
            val = "#" + obj + "#";
            return val;
        default:
            if (typeof obj === "object") {
                vObj = [];

                for (attr in obj) {
                    //console.warn(attr, typeof obj[attr], obj[attr]);
                    if (obj.hasOwnProperty(attr)) {
                        if (attr === "elems") {
                            vObj.push('"' + attr + '": ["' + obj[attr].id + '"]');
                        }
                        else if (typeof obj[attr] !== "function") {
                            if (typeof obj[attr] === "object" || typeof obj[attr] === "number") {
                                vObj.push('"' + attr + '": ' + this.serialize(obj[attr]));
                            }
                            else {
                                vObj.push('"' + attr + '": "' + this.serialize(obj[attr]) + '"');
                            }
                        }
                    }
                }

                if (vObj.length > 0) {
                    return "{" + vObj.join(",") + "}";
                }
                else {
                    return "{}";
                }
            }
            else {
                return obj.toString();
            }
        }
    }

    return null;
};