Sha256: abb83e01a749f9cdd3bb0b43ffeb120217e08b903028b12ce2b5e37d515126f8
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Size: 1.11 KB
Versions: 17
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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Performance
# This cop identifies places where `sort_by { ... }` can be replaced by
# `sort`.
#
# @example
# @bad
# array.sort_by { |x| x }
# array.sort_by do |var|
# var
# end
#
# @good
# array.sort
class RedundantSortBy < Cop
MSG = 'Use `sort` instead of `sort_by { |%s| %s }`.'.freeze
def_node_matcher :redundant_sort_by, <<-END
(block $(send _ :sort_by) (args (arg $_x)) (lvar _x))
END
def on_block(node)
redundant_sort_by(node) do |send, var_name|
range = sort_by_range(send, node)
add_offense(node, range, format(MSG, var_name, var_name))
end
end
def autocorrect(node)
send, = *node
->(corrector) { corrector.replace(sort_by_range(send, node), 'sort') }
end
private
def sort_by_range(send, node)
range_between(send.loc.selector.begin_pos, node.loc.end.end_pos)
end
end
end
end
end
Version data entries
17 entries across 17 versions & 2 rubygems