A recent Rubocop update introduced a new cop “Style/MapIntoArray” which discourages developers from looping over a collection only to populate another collection with some output.

Instead of this approach we should be using array functions like #map, #select, #reject etc.

# ❌ Violates Rubocop v1.63.0 Style/MapIntoArray
collection_one = []  
collection_two.each do |item|  
  collection_one.push(item + 1)

# ✅ Complies with Style/MapIntoArray cop
collection_one = collection_two.map do |item|
	item + 1