Function isSubsetOf

Implementation of the subset operation in set theory, which checks if set A is a subset of set B. A subset means all elements of set A are elements of B.

• Formal definition: A ⊆ B
• This method runs in linear time, or O(n), where n = |A| (size of set A).

See

Set.prototype.isSubsetOf

Example

// {1} ⊂ {1, 3}
isSubsetOf(new Set([1]), new Set([1, 3])); // true
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