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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Performance
# Identifies places where `sort { |a, b| b <=> a }`
# can be replaced by a faster `sort.reverse`.
#
# @example
# # bad
# array.sort { |a, b| b <=> a }
#
# # good
# array.sort.reverse
#
class SortReverse < Base
include SortBlock
extend AutoCorrector
MSG = 'Use `%<prefer>s` instead.'
def on_block(node)
sort_with_block?(node) do |send, var_a, var_b, body|
replaceable_body?(body, var_b, var_a) do
register_offense(send, node)
end
end
end
def on_numblock(node)
sort_with_numblock?(node) do |send, arg_count, body|
next unless arg_count == 2
replaceable_body?(body, :_2, :_1) do
register_offense(send, node)
end
end
end
private
def register_offense(send, node)
range = sort_range(send, node)
prefer = "sort#{send.loc.dot.source}reverse"
message = format(MSG, prefer: prefer)
add_offense(range, message: message) do |corrector|
corrector.replace(range, prefer)
end
end
end
end
end
end
Version data entries
12 entries across 12 versions & 4 rubygems