class RuboCop::Cop::Style::ArrayJoin

This cop checks for uses of “*” as a substitute for join.

Not all cases can reliably checked, due to Ruby's dynamic types, so we consider only cases when the first argument is an array literal or the second is a string literal.

Constants

MSG

Public Instance Methods

autocorrect(node) click to toggle source
# File lib/rubocop/cop/style/array_join.rb, line 22
def autocorrect(node)
  receiver_node, _method_name, *arg_nodes = *node
  array = receiver_node.source
  join_arg = arg_nodes[0].source

  lambda do |corrector|
    corrector.replace(node.source_range, "#{array}.join(#{join_arg})")
  end
end
on_send(node) click to toggle source
# File lib/rubocop/cop/style/array_join.rb, line 14
def on_send(node)
  receiver_node, method_name, *arg_nodes = *node
  return unless receiver_node && receiver_node.type == :array &&
                method_name == :* && arg_nodes[0].type == :str

  add_offense(node, :selector)
end