Dot operator angularjs

Case 1:

Output

• If i write something in first textbox, updates all

• If I type something in second textbox then it will update only the second one

• If  I update the first textbox it doesn't update the second one as it is already touched. But it updates the other textbox.

• Implementing in the below way(dot opeartor)

• Output is it updates all the textbox which ever is touched.                                                                           
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