Learn Ruby and Rails app testing with The Minitest Cookbook
Learn to test with confidence Learning to test your Ruby and Rails code can be tough. Even after you've been through blog posts and tutorials, screencasts and demo apps, you might find yourself feeling more lost than ever. Ruby and Rails developers emphasize testing for good reasons, and you want to get on board, but even so, it can be damn hard to learn. You just want to write tests that tell you
Cookbook for R
Welcome to the Cookbook for R. The goal of the cookbook is to provide solutions to common tasks and problems in analyzing data. Most of the code in these pages can be copied and pasted into the R command window if you want to see them in action. Basics Numbers Strings Formulas Data input and output Manipulating data Statistical analysis Graphs Scripts and functions Tools for experiments My book ab
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