A practical refactoring journey addressing Ruby 3.4's frozen string literal warnings by replacing mutable string concatenation with an immutable array-based approach, then evolving it into a dedicated single-purpose Message class. The solution eliminates primitive obsession, hides implementation details, supports flexible

7m read time From blog.arkency.com
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Ruby has both mutable and immutable stringsProblem with string literal mutation in our codeNoticing the patternImprove the codeFinal refactoringSummary

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