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Optional method parameters in Ruby

Example 1:

def some_method(required_1, required_2, options={})
  # Do something awesome!
  puts options.inspect
end

some_method("foo", "bar")
some_method("foo", "bar", :option_1 => false, :option_2 => true)
some_method("foo", "bar",
            :option_1 => false,
            :option_2 => true,
            :option_3 => "something",
            :option_4 => "something else")

__END__
{}
{:option_1=>false, :option_2=>true}
{:option_1=>false, :option_2=>true, :option_3=>"something", :option_4=>"something else"}





Example: 2

def foo(regular, hash={})
    puts "regular: #{regular}"
    puts "hash: #{hash}"
    puts "a: #{hash[:a]}"
    puts "b: #{hash[:b]}"
end

foo("regular argument", a: 12, :b => 13)


Title
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30 Ruby Style Guide Hojung 2015.02.05 2014
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