false, true

"Lydia", 21

true, true

undefined, undefined

[[1, 2, 3, 4, 5]]

[1, 2, 3, 4, 5]

1

[1]

["👻", "🎃", "🕸"]

["👻", "🎃", "🕸", "💀"]

["👻", "🎃", "🕸", { item: "💀" }]

["👻", "🎃", "🕸", "[object Object]"]

1 2 3

{1: 1} {2: 2} {3: 3}

{ 1: undefined } undefined undefined

undefined undefined undefined

false true

true false

false false

true true

SyntaxError

ReferenceError

I love to program

undefined to program

${(x => x)('I love') to program

TypeError

Lydia

Sarah

undefined

ReferenceError

['🍕', '🍫', '🥑', '🍔']

['🍝', '🍫', '🥑', '🍔']

['🍝', '🍕', '🍫', '🥑', '🍔']

ReferenceError

true

false

undefined

TypeError