Acknowledgments

This is the most demanding book I have ever written. It’s also the most rewarding. The people who have offered to help in various ways have made it so. Thanks first and foremost to my family. Kayla and Julia, your writing amazes me. You can’t yet imagine what you can accomplish. Maggie, you are my joy and inspiration.

In the Ruby community, thanks to Dave Thomas for turning me on to the language that turned my career upside down and helped me have fun again. Thanks also to Matz for your friendship and your offer to share your thoughts with my readers. You invited me to Japan to visit the place where Ruby was born, and that experience inspired me much more than you will ever know. To Charles Nutter, Evan Phoenix, and Tim Bray, ...

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