You want to write a method that accepts named parameters for :title, :author, and :year, but only :title is required. How would you define this method using a hash as named parameters?

hard📝 Application Q8 of 15

Ruby - Hashes

Adef book_info(options = {}) "#{options[:title]} by #{options[:author]}, #{options[:year]}" end

Bdef book_info(title, author = nil, year = nil) "#{title} by #{author}, #{year}" end

Cdef book_info(title:, author: nil, year: nil) "#{title} by #{author}, #{year}" end

Ddef book_info(title: nil, author: nil, year: nil) "#{title} by #{author}, #{year}" end

Step-by-Step Solution

Solution:

Step 1: Use keyword arguments for required and optional params
title: is required (no default), author: and year: have nil defaults.
Step 2: Confirm method signature matches requirements
def book_info(title:, author: nil, year: nil) "#{title} by #{author}, #{year}" end uses keyword arguments correctly with required title.
Final Answer:
def book_info(title:, author: nil, year: nil)\n "#{title} by #{author}, #{year}"\nend -> Option C
Quick Check:
Required keyword param = title: without default [OK]

Quick Trick: Use keyword args with defaults for optional params [OK]

Common Mistakes:

Using hash with no required keys
Using positional arguments instead of keywords
Setting required keys with nil default

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More Ruby Quizzes

You want to write a method that accepts named parameters for :title, :author, and :year, but only :title is required. How would you define this method using a hash as named parameters?

Step 1: Use keyword arguments for required and optional params

Step 2: Confirm method signature matches requirements

Final Answer:

Quick Check:

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