[Solved] What will be the output of this Ruby code?class MyCollection include Enumerable def initialize(items) @items = items end def each @items.each { |item| yield item } end end col = MyCollection.... | Ruby

Ruby - Enumerable and Collection Processing

What will be the output of this Ruby code?

class MyCollection
  include Enumerable
  def initialize(items)
    @items = items
  end
  def each
    @items.each { |item| yield item }
  end
end

col = MyCollection.new([1, 2, 3])
p col.map { |x| x * 2 }

AError: undefined method `map`

B[1, 2, 3]

C[2, 4, 6]

Dnil

Step-by-Step Solution

Solution:

Step 1: Understand how Enumerable works with each
The class includes Enumerable and defines each to yield items from @items. Calling map on col applies the block multiplying each element by 2, resulting in [2, 4, 6].
Final Answer:
[2, 4, 6] -> Option C
Quick Check:
Enumerable map doubles elements [OK]

Quick Trick: Enumerable methods need an each method defined [OK]

Common Mistakes:

Forgetting to define each
Expecting map without each
Confusing map output with original array

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What will be the output of this Ruby code?

Step 1: Understand how Enumerable works with each

Final Answer:

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