{ a: "three", b: "two" }

{ a: "one", b: "two" , a: "three"}

{ a: "one", b: "two"}

Undefined

TypeError

[1, 2, 3, 4, 5]

[1, 3, 5]

[2, 4]

[2, 3, 4, 5, 6]

[2, 4, 6, 8, 10]

12, 12

12, 36

36, 36

36, 12

{12, 36}

TypeError

1 1

1 2

2 1

NaN NaN

Undefined 1

Undefined Undefined

true true

false true

"Alex" 18

undefined undefined

true false

11

10

9

12

'38'

"false true true false"

"false true false true"

"false true true true"

"true false true false"

"true false false false"

"ello World!"

"hello world!"

"Hello World!"

"ello world!"

"H"

TypeError

6

3

4

undefined

NaN

2

"2*7", 10

"2*7"

14

4

Undefined

[NaN,NaN,NaN]

[2,4,8]

[2,NaN,NaN]

[2,4,NaN]

Error