Question

I am using Ruby on Rails 3.0.7 and I would like to know what is a common practice\technique to iterate an array composed from a lot of data and fire an event each three iterations.

I can do something like this

# "fire_the_event" is a method
count = 0
array.each do |element|
  count += 1

  fire_the_event if count % 3 == 0
end

but there is a “better”\”more performant” way to fire_the_event each three times?

Answer 1

You can use the each_slice method

array.each_slice(3) do |elements|
  fire_the_event
end