Function areSetsEqual

Checks if two sets are equal, where two sets have the same number of elements, and same elements themselves

• Formal definition: A = B means ∀z, (z ∈ x ⇔ z ∈ y)
• This method runs in linear time, or O(n), where n = |A| (size of set A).
• Note: This does not check for reference/entity equality, but rather value equality.

Example

// {1, 2, 3, 4} = {1, 2, 3, 4}
areSetsEqual(new Set([1, 2, 3, 4]), new Set([1, 2, 3, 4])); // true

// {hello, world} = {hello, world}
areSetsEqual(new Set(['hello', 'world']), new Set(['hello', 'world'])); // true
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