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Nil

inherits Iterable final

Nil is a special class with exactly one instance - it cannot be instantiated. It can be treated as a permanently empty iterable that will never have contents to iterate, but does not require checking for nil? before using in a foreach loop.

methods

• nil?() Returns true
• to_string() Returns the empty string “” (because checking for nil? can be cumbersome)
• empty?() returns true

iterable

Nil is an iterable that is permanently empty (because checking for nil? can be cumbersome)