Using JSON.stringify on custom class

Question

I\'m trying to store an object in redis, which is an instance of a class, and thus has functions, here\'s an example:

function myClass(){
    this._attr = \"         


        

Answer 1

No, JSON does not store functions (which would be quite inefficient, too). Instead, use a serialisation method and a deserialisation constructor. Example:

function MyClass(){
    this._attr = "foo";
    this.getAttr = function(){
        return this._attr;
    }
}
MyClass.prototype.toJSON() {
    return {attr: this.getAttr()}; // everything that needs to get stored
};
MyClass.fromJSON = function(obj) {
    if (typeof obj == "string") obj = JSON.parse(obj);
    var instance = new MyClass;
    instance._attr = obj.attr;
    return instance;
};