table: { number: number, names: string[] } = {
    number: 0,
    names: ['']
  };

addTable(){

    let prompt = this.alertCtrl.create({
      title: 'Add Table',
      subTitle: 'Enter the table number',
      inputs: [{
        name: 'tableNumber',
        placeholder: 'Number',
        type: 'number'
      }],
      buttons: [
        {
          text: 'Cancel'
        },
        {
          text: 'Add',
          handler: data => {
            //this.tables.push(data);
            this.table.number = data;
          }
        }
      ]
    });

    prompt.present();

  }