class RuboCop::Cop::Style::SingleArgumentDig


{ key1: { key2: ‘value’ } }.dig(*keys)
keys = %i[key1 key2]
# good
[1, [2, [3]]].dig(1, 1)
{ key1: { key2: ‘value’ } }.dig(:key1, :key2)
# good
[1, 2, 3][0]
{ key: ‘value’ }[:key]
# good
[1, 2, 3].dig(0)
{ key: ‘value’ }.dig(:key)
# bad
@example
argument. In such cases, dig should be replaced with [].
Sometimes using dig method ends up with just a single

def on_send(node) 

def on_send(node)
  return unless node.receiver
  expression = single_argument_dig?(node)
  return unless expression
  receiver = node.receiver.source
  argument = expression.source
  message = format(MSG, receiver: receiver, argument: argument, original: node.source)
  add_offense(node, message: message) do |corrector|
    correct_access = "#{receiver}[#{argument}]"
    corrector.replace(node, correct_access)
  end
end