Set values from array to true in Ionic2 app check-boxes pop-up menu list

In pop-up menu with check-boxes:

     this.itm = [
          { name: 'name1', checked: false },
          { name: 'name2', checked: false },
          { name: 'name3', checked: false },
          { name: 'name4', checked: false },
          { name: 'name5', checked: false },     
          { name: 'name6', checked: false },     
          { name: 'name7', checked: false },     
        ];
      }

if I have some updated array: private arr: any[] = []; with particular content, retrieved from database record with back-end echo for example, what is a proper way to set this values in check-boxes pop-up menu to true as by default, to see this names already checked with opening:

   name3
   name5
   name7