The code from the Learn JavaScript the Hard Way module JavaScript Level 1 exercises. This is a mirror of the code I have in the book, so if you're struggling you can use this to compare against your attempts.
 
js-level-1-code/ex26-transforming-data
Zed A. Shaw 47d4ee7f00 Bring the code over. 2 years ago
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code.js Bring the code over. 2 years ago