* Avoid explicit use of`self` as the recipient of internal class or instance

messages unless to specify a method shadowed by a variable.

<aname="self-messages"></a>^{[[link](#self-messages)]}

* <ahref="https://docs.rubocop.org/rubocop/cops_style.html#styleredundantself">RuboCop rule: Style/RedundantSelf</a>

defgreeting(name)

message="Hi#{name}"# local variable in Ruby, not attribute writer

self.message= message

* Prefer`%w` to the literal array syntax when you need an array of