[Solved] What will this Ruby code print?class CatchAll def method_missing(name, *args) if name.to_s.start_with?('say_') "You said: #{args.join(' ')}" else super end end end obj = CatchAll.new puts obj.... | Ruby

Ruby - Metaprogramming Fundamentals

What will this Ruby code print?

class CatchAll
  def method_missing(name, *args)
    if name.to_s.start_with?('say_')
      "You said: #{args.join(' ')}"
    else
      super
    end
  end
end
obj = CatchAll.new
puts obj.say_hello('Ruby')

ANoMethodError: undefined method `say_hello'

BYou said: Ruby

CYou said: say_hello Ruby

Dsuper

Step-by-Step Solution

Solution:

Step 1: Check method_missing condition
If method name starts with 'say_', it returns a string with joined arguments.
Step 2: Call obj.say_hello('Ruby')
Method name is 'say_hello', so condition matches and returns 'You said: Ruby'.
Final Answer:
You said: Ruby -> Option B
Quick Check:
Conditional method_missing returns custom string = A [OK]

Quick Trick: Use conditions inside method_missing to handle specific method patterns [OK]

Common Mistakes:

Expecting super to be called always
Ignoring method name string conversion
Confusing output with method name included

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What will this Ruby code print?

Step 1: Check method_missing condition

Step 2: Call obj.say_hello('Ruby')

Final Answer:

Quick Check:

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