[Solved] What is the output of this Ruby code combining OOP and functional style?... What is the output of this Ruby code combining OOP and functional style? | Ruby

Ruby - Functional Patterns in Ruby

What is the output of this Ruby code combining OOP and functional style?

class Counter
  def initialize
    @count = 0
  end

  def increment
    @count += 1
  end

  def current
    @count
  end
end

counter = Counter.new
3.times { counter.increment }
puts counter.current

A1

B0

CError

D3

Step-by-Step Solution

Solution:

Step 1: Understand the Counter class behavior
The class starts with @count = 0 and increments it by 1 each time increment is called.
Step 2: Trace the code execution
increment is called 3 times, so @count becomes 3; current returns @count.
Final Answer:
3 -> Option D
Quick Check:
Counter increments 3 times = 3 [OK]

Quick Trick: Increment method updates count; current returns it [OK]

Common Mistakes:

Assuming @count resets each time increment is called
Confusing method names or forgetting to call increment
Expecting output before increment calls

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What is the output of this Ruby code combining OOP and functional style?

Step 1: Understand the Counter class behavior

Step 2: Trace the code execution

Final Answer:

Quick Check:

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