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JavaScript D3.js Selections with D3.js Course Overview

Save your self the trouble. View Udacity's course on D3.js or a good tutorial on Youtube.

This is more a suggestion than a question. The course is not like the other Treehouse teachers' style where each video build a small piece of the application and there is a good description of what is being added.

Instead all the code is put there before hand, and the description of the code leaves you more confused than informed. I am sure the teacher is a great guy, but this course was not as well made as the others.