--- (1) ---
{}

--- (2) ---
false
false
false
false
false

--- (3) ---
number

--- (4) ---
undefined
undefined
undefined

 --- (5) ---
{ name: 'obj' }
{ name: 'obj' }
{ name: 'obj' }

 --- (6) ---
true

 --- (7) ---
true
true

 --- (8) ---
John Doe

 --- (9) ---
2 6
undefined undefined