custom_each_iterator.md

🔄 Define Custom Iterators with yield

Creating your own iterator methods helps encapsulate collection logic. You can use yield to pass each element to the block provided by the caller. This approach mimics Ruby’s Enumerable behavior and keeps consumer code clean.

class MyCollection
  def initialize(items)
    @items = items
  end

  def each
    @items.each do |item|
      yield(item)
    end
    self
  end
end

coll = MyCollection.new([1, 2, 3])
coll.each do |n|
  puts n * 2
end
# Outputs:
# 2
# 4
# 6