For a long time, Ruby's assignment evaluation order was inconsistent. Normal assignment would evaluate the left hand side before the right hand side, but multiple assignment and constant assignment would evaluate the right hand side first. This issue was known since before the release of Ruby 1.9.3, but it was considered difficult to fix. Come learn how we fixed evaluation order for multiple assignment in Ruby 3.1, and evaluation order for constant assignment in Ruby 3.2.
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Jeremy Evans is a Ruby committer who focuses on fixing bugs in Ruby. He the lead developer of the Sequel database library, the Roda web toolkit, the Rodauth authentication framework, and many other Ruby libraries. He is the author of "Polished Ruby Programming". He is the maintainer of Ruby ports for the OpenBSD operating system.