return if !User.exists(id=100) reads just fine and takes less letters. I don't think unless is "bad", it's just unnecessary > It indicates you don't understan

return if !User.exists(id=100) reads just fine and takes less letters. I don't think unless is "bad", it's just unnecessary > It indicates you don't understand Ruby if you find yourself using an "unless" in a complex boolean operation. It's meant for simple cases like an inline return statement unless `git status -s | grep -v 'RAILS_VERSION\\|CHANGELOG\\|Gemfile.lock\\|package.json\\|version.rb\\|tasks/release.rb'`.strip.empty? abort "[ABORTING] `git status` reports a dirty tree. Make sure all changes are committed" end is not exactly very readable and this unless connection.adapter_name == "Mysql2" && options[:id] == :bigint if [:integer, :bigint].include?(options[:id]) && !options.key?(:default) options[:default] = nil end end isn't glancable either. Just random snippets from Rails code. You can see how author wanted some bonus points and used unless, if, and ! too. Sure it isn't hard to figure out but it makes it needlesly obtuse