The Hash class is a Ruby's variant of a dictionary or associative array.
To add a new pair to Hash I do: {:a => 1, :b => 2}.merge!({:c => 3}) #=> {:a => 1, :b =&…
ruby-on-rails ruby ruby-on-rails-3 hashmap ruby-hashI have a big problem with the expected RuntimeError: "can't add a new key into hash during iteration" In my …
ruby-on-rails ruby ruby-hash