“for” vs “each” in Ruby

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I just had a quick question regarding loops in Ruby. Is there a difference between these two ways of iterating through a collection?

# way 1
@collection.each do |item|
  # do whatever
end

# way 2
for item in @collection
  # do whatever
end

Just wondering if these are exactly the same or if maybe there’s a subtle difference (possibly when @collection is nil).

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