How to grow your own web development framework from Rack (4 part series)
The 4 part series will cover what Rack is, how to use it to handle incoming requests, how to use templating techniques to return a response, and finally, how to extract common code to plant the seeds for your very own web application development framework.
https://launchschool.com/blog/growing-your-own-web-framework-with-rack-part-1
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