List<String> lstAlpha = accountToUpdate.split(',');
            List<Id> AccIds = new List<Id>();
            for(String s: lstAlpha)
            {
              s.replaceAll('\p{P}','');
              s = s.substring(1,s.length());
             system.debug('String@'+s);
              Id i = s;
              AccIds.add(i);
            }

for (var x = 0; x < this.items.length; x++) {
                    if(this.items[x].selected){
                    var acc = this.items[x];
                    this.accids.push(acc.Id);
                    alert('Icheck2@'+this.accids);
                    }
                    }

Initialized -  accids: []