[Solved] Find the problem in this Ruby code snippet: class Calculator def initialize @value = 10 define_method(:add) { |x| @value + x } end end calc = Calculator.new puts calc.add(5) | Ruby

Ruby - Advanced Metaprogramming

Find the problem in this Ruby code snippet:

class Calculator
  def initialize
    @value = 10
    define_method(:add) { |x| @value + x }
  end
end

calc = Calculator.new
puts calc.add(5)

AMissing parentheses in define_method call

BThe add method does not update @value, only returns sum

CCannot pass parameters to define_method block

DInstance variable @value is not initialized

Step-by-Step Solution

Solution:

Step 1: Analyze add method behavior
The block returns @value + x but does not assign the result back to @value.
Step 2: Understand expected behavior
If the goal is to update @value, the method should assign the sum to @value.
Final Answer:
The add method does not update @value, only returns sum -> Option B
Quick Check:
Method returns sum but does not change @value [OK]

Quick Trick: define_method block can take parameters like normal methods [OK]

Common Mistakes:

Master "Advanced Metaprogramming" in Ruby

9 interactive learning modes - each teaches the same concept differently

More Ruby Quizzes

Find the problem in this Ruby code snippet: