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RubyFlow The Ruby and Rails community linklog

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The Ruby and Rails community linklog

Made a library? Written a blog post? Found a useful tutorial? Share it with the Ruby community here or just enjoy what everyone else has found!

class_eval vs module_eval

Adding methods or attributes to a class/module “on-the-fly” is a pretty common pattern in Ruby (activerecord, activesupport, rake, rack, etc..).

To do so, we can use the Module#class_eval and Module#module_eval methods..
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