ruby's magic underscore

gistfile1.rb

people = {
  "Alice" => ["green", 34, "alice@example.com"],
  "Bob"   => ["brown", 27, "bob@example.com"]
}
# No problem. Just re-use the underscore:

people.map { |name, (_, _, email)| [name, email] }

a, _, b, _, c = [1, 2, 3, 4, 5]

a # => 1
b # => 3
c # => 5

a, *, b = [1, 2, 3, 4, 5]

a # => 1
b # => 5