1
Ruby adds a core class called Data to represent simple immutable value objects
The Data class helps define simple classes for value-alike objects that can be extended with custom methods.
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2
Rails adds support for Fiber-safe ActiveRecord ConnectionPools
ActiveRecord's ConnectionPool is now fiber-safe! Configure config.active_support.isolation_level for better throughput.
3
Ruby Lazy Enumerators
Ruby provides support for lazy loading enumerators, allowing efficient processing of large or infinite sequences.
4
Ruby adds experimental support for rightward assignments
Previously ruby used to support only Rvalue to be assigned to Lvalue. Now, it adds support for Rightward assignment