Why does google main page use (0, obj.func)(args) syntax?

Question

Sometimes I stared at js provided with google.com main page and found that they tended to use (0, obj.func)(args) syntax. Here are excerpts from the script:

Answer 1

This makes an indirect call.

This ensures the context, in the called function, is the global one. This might be useful in an internal scope.

Example :

var a = {
  b: function(){
     console.log(this);    
  },
  c1: function(){
     this.b(); 
  },
  c2: function(){
     (0, this.b)(); 
  },
  c3: function(){
     (this.b)(); 
  }
}
a.c1(); // logs a
a.c2(); // logs window
a.c3(); // logs a