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deep_freeze_immutable_arrays.md

🛡️ Deep Freeze for Immutable Arrays​

Ensure complete immutability of nested arrays by performing a recursive freeze. This prevents accidental mutations in complex data structures shared across threads or modules.

class Array
  def deep_freeze
    each { |el| el.deep_freeze if el.respond_to?(:deep_freeze) }
    freeze
  end
end

# Usage
config = [[1,2], [3,4]].deep_freeze
config.frozen?           # => true
config[0].frozen?       # => true