Posted about 5 years ago. Visible to the public. Linked content.

Ruby 2.0 introduces keyword arguments

"Keyword arguments" allow naming method arguments (optionally setting a default value). By using the double-splat operator, you can collect additional options. Default values for standard arguments still work (see adjective).

def greet(name, adjective = 'happy', suffix: '!', count: 7, **options) greeting = options[:letter] ? 'Dear' : 'Hello' puts "#{greeting} #{adjective} #{name + suffix * count}" end

Invoke the method like this:

greet('Otto', 'sad', suffix: '??', count: 9, include_blank: true)

In Ruby 2.1+, you can also make an argument required by not giving it a default value: def something(required_option:).

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Dominik Schöler
Last edit:
11 months ago
by Dominik Schöler
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