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Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →

instance method

Comparable#<

obj < other → true or false

Compares two objects based on the receiver’s <=> method, returning true if it returns a value less than 0.

See also #<= #== also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0