constructor(
     public _demoService: DemoService,
     private ls:LocalStorage) {
         if(Object.getOwnPropertyNames(this.ls.getObject('main')).length === 0){
             this.ls.setObject('settings', []);
         }
     }

    remove(key) {

        this.cache[key] = null;
        delete this.cache[key];
        this._cookieService.remove(key);
        this._localStorage.remove(key);
    }

    nuke() {

        for (let cookie in this.cacheKeys) {
            let key = this.camelize(cookie);
            this._localStorage.remove(key);
        }
        this._cookieService.removeAll();
        this.cache = {};
    }

    put(key, value) {

        if (key !== this.cacheKeys.Card) {
            try {
                this._cookieService.put(key, value);
                this._localStorage.set(key, value);
                this.cache[key] = value;
            } catch (e) {
                console.error('cache error!', e);
            }
        }
    };