You want to create multiple methods dynamically that remember different greetings. Which code correctly uses define_method with closures to achieve this?

hard📝 Application Q8 of 15

Ruby - Advanced Metaprogramming

You want to create multiple methods dynamically that remember different greetings. Which code correctly uses define_method with closures to achieve this?

class MultiGreeter
  def initialize(greetings)
    greetings.each do |key, phrase|
      # fill in here
    end
  end
end

mg = MultiGreeter.new({hello: 'Hi', bye: 'Goodbye'})
puts mg.hello
puts mg.bye

Adefine_method(key) { phrase }

Bdefine_method(key) { puts phrase }

Cdefine_method(:key) { phrase }

Ddefine_method(key) { puts key }

Step-by-Step Solution

Solution:

Step 1: Understand dynamic method creation with closures
Each method should return the phrase string stored in the closure.
Step 2: Check each option
define_method(key) { phrase } correctly defines method named by key returning phrase. define_method(key) { puts phrase } prints phrase but returns nil. define_method(:key) { phrase } uses symbol :key literally, not variable. define_method(key) { puts key } returns key, not phrase.
Final Answer:
define_method(key) { phrase } -> Option A
Quick Check:
Use variable key and phrase in define_method block [OK]

Quick Trick: Use variables directly inside define_method block for closures [OK]

Common Mistakes:

Using symbol literal instead of variable
Using puts inside block returning nil
Returning wrong variable

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You want to create multiple methods dynamically that remember different greetings. Which code correctly uses define_method with closures to achieve this?

Step 1: Understand dynamic method creation with closures

Step 2: Check each option

Final Answer:

Quick Check:

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