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Contents
# frozen_string_literal: true
require 'eac_ruby_utils/core_ext'
module EhbrsRubyUtils
class CircularListSpreader
class List
require_sub __FILE__, require_dependency: true
class << self
def empty
new([], 0)
end
end
enable_simple_cache
common_constructor :items, :inserted_at
compare_by :spreadness, :inserted_at
delegate :count, to: :items
def insert(position, item_level)
dup_items = items.dup
dup_items.insert(position, item_level)
self.class.new(dup_items, position)
end
def items_pair_enumerator
::Enumerator.new do |enum|
(count - 1).times do |li|
((li + 1)..(count - 1)).each do |ri|
enum.yield(li, ri)
end
end
end
end
def to_s
items.map { |i| i.item.to_s }.join(', ')
end
private
# @return [Integer]
def spreadness_uncached
items_pair_enumerator.inject(0) { |a, e| a + item_pair_spreadness(*e) }
end
end
end
end
Version data entries
31 entries across 31 versions & 1 rubygems