Set

Constructors

• Set:new()
• Set:new(iterable)
• Set:new(set) - copy constructor.

Operators

• == - exactly the same values.
• + - union.
• - - difference.

Methods

Modify:

• add(value)
• add_all(iterable)
• remove(value)
• remove_all(iterable)

Inspect:

• to_table() - 1-indexed table.
• pairs()

New sets:

• union(other) - all values in both sets.
• difference(other) - all values in self not in other.
• intersection(other) - all values that are in both.

Query:

• contains(value) - returns boolean.
• is_subset - boolean, other is subset of self.
• is_disjoint - boolean, sets have nothing in common.