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Rails style database migrations are a useful way to evolve your data schema in an agile manner. Most Rails projects start like this, and at first, making changes is fast and easy. That is until your tables grow to millions of records. At this point, the locking nature of ALTER TABLE may take your site down for an hour or more while critical tables are migrated. In order to avoid this, developers b
require 'adamantium' require 'securerandom' class Example # Inclusion of Adamantium defaults to deep freeze behavior # of constructor and memoizer include Adamantium # Instance and attributes (ivars) are frozen per default # Example: # # object = Example.new # object.frozen? # => true # object.attribute.frozen? # => true # def initialize @attribute = "foo bar" end attr_reader :attribute # Memoized
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