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End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

OptionParser::Switch::NoArgument#parse

parse(arg, argv) { |NeedlessArgument, arg| ... }

Raises an exception if any arguments given.

See also .pattern .incompatible_argument_styles also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1