1 2, 3 3 va 6 4

1 2, 2 3 va 3 4

1 undefined, 2 undefined, 3 undefined va 4 undefined

1 2, undefined 3 va undefined 4

["👻", "🎃", "🕸"]

["👻", "🎃", "🕸", "💀"]

["👻", "🎃", "🕸", { item: "💀" }]

["👻", "🎃", "🕸", "[object Object]"]

[0, 10], [10, 20]

20, 20

10, 20

0, 10 and 10, 20

true false true false

true false false false

false false true false

false true false true

"Sorry, you're too young."

"Yay! You're old enough!"

ReferenceError

undefined

{ constructor: ...} { constructor: ...}

{} { constructor: ...}

{ constructor: ...} {}

{ constructor: ...} undefined

"number"

"string"

undefined

ReferenceError

Woah some cool data

Oh finally!

Woah some cool data Oh finally!

Oops didn't work Oh finally!

['🥑', ['✨', '✨', ['🍕', '🍕']]]

['🥑', '✨', '✨', ['🍕', '🍕']]

['🥑', ['✨', '✨', '🍕', '🍕']]

['🥑', '✨', '✨', '🍕', '🍕']

0

1

2

3