class RuboCop::Cop::Lint::DuplicatedKey
This cop checks for duplicated keys in hash literals.
This cop mirrors a warning in Ruby 2.2.
@example
hash = { food: 'apple', food: 'orange' }
Constants
- MSG
Public Instance Methods
on_hash(node)
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# File lib/rubocop/cop/lint/duplicated_key.rb, line 15 def on_hash(node) keys = [] hash_pairs = *node hash_pairs.each do |pair| key, _value = *pair if keys.include?(key) && key.recursive_basic_literal? add_offense(key, :expression) end keys << key end end