# frozen_string_literal: true # Oppen. module Oppen # Utils. module Utils # Rotates circular array and triples its size. # @param arr [Array] # @param offset [Integer] Rotation amount # # @return [Array(Array, Integer, Integer)] upsized array, lhs, rhs def self.upsize_circular_array(arr, offset) size = arr.size arr = arr.rotate(offset) arr.fill(nil, size, 2 * size) [arr, 0, size] end end end