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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for duplicated keys in hash literals.
#
# This cop mirrors a warning in Ruby 2.2.
#
# @example
#
# # bad
#
# hash = { food: 'apple', food: 'orange' }
#
# @example
#
# # good
#
# hash = { food: 'apple', other_food: 'orange' }
class DuplicatedKey < Cop
include Duplication
MSG = 'Duplicated key in hash literal.'.freeze
def on_hash(node)
keys = node.keys.select(&:recursive_basic_literal?)
return unless duplicates?(keys)
consecutive_duplicates(keys).each do |key|
add_offense(key)
end
end
end
end
end
end
Version data entries
6,793 entries across 6,787 versions & 25 rubygems