title: How to pass parameter from one tab to another tab in Ionic 3
body: <p>As I am new to Ionic 3 I want to know how to pass parameter from one tab to another tab. I am using navCtrl.parent.select(index). I am able to navigate to the other tab but unable to pass the parameter. I am using the following code to achieve this. But failed to retrieve params. 
  Thanks in advance for reply</p>
  
  <p>let prm = {
        dt:19,
        month: "November"
      };
      this.navCtrl.parent.select(0).rootParams= prm;</p>