frozen is kept in variable assignment but not converting : freeze « Hash « Ruby

1. Ruby
2. Hash
3. freeze

frozen is kept in variable assignment but not converting

hash = { 1 => 1, 2 => 4, 3 => 9 }
hash.freeze
arr = hash.to_a
puts hash.frozen?                   # true
puts arr.frozen?                    # false
hash2 = hash
puts hash2.frozen?                  # true

 

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