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Grunts at fragile rails

Isn't this scary to see forerunners' grunts at the rails' fragility? https://blog.abevoelker.com/sick-of-ruby-dynamic-typing-side-effects-object-oriented-programming/ I felt the same way when I was learning "Build a Todo List Application with Rails 4" course - I made a lot of errors and fails while coding, adding, and changing and at first I thought it was ok seeing the power of test driven development; howver, in the later stage of the course when things took a practical shape, there was still a lot of fragile breaks. It's overwhelming to see such a lot of problems and ruby has no compiler to check correcness until we test - scary!

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