Let's hash this out.

17-Oct-2019 1896
How hashes have changed in the last few versions of Rails, and how you can handle them to minimize the pain of your next upgrade.Ruby hashes are wonderfully versatile. You can store any kind of object using any kind of key and do all sorts of wacky and magical things. Hashes bring joy. Odes have been written to the wonderful "hashrocket" (Ruby's affectionate name for the => operator).
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