Chapter 3 - Hobbit Violence - Unexpected Result

[shamal]

I get a messily ordered vector of hobbit body parts when I execute (symmetrize-body-parts asym-hobbit-body-parts) .

According to the answer shown in the book and the code , symmetrize should return a vector of body parts which has {left-part} before the matching {right-part}.

But When I execute, I get the following vector.

Note that towards the end of the vector, the matching {right-part} comes before {left-part}.

Am I doing something wrong? or is this a bug?

Thank you.

(symmetrize-body-parts asym-hobbit-body-parts)
=>
[{:name "head", :size 3}
 {:name "left-eye", :size 1}
 {:name "right-eye", :size 1}
 {:name "left-ear", :size 1}
 {:name "right-ear", :size 1}
 {:name "mouth", :size 1}
 {:name "nose", :size 1}
 {:name "neck", :size 2}
 {:name "left-shoulder", :size 3}
 {:name "right-shoulder", :size 3}
 {:name "right-upper-arm", :size 3}
 {:name "left-upper-arm", :size 3}
 {:name "chest", :size 10}
 {:name "back", :size 10}
 {:name "left-forearm", :size 3}
 {:name "right-forearm", :size 3}
 {:name "abdomen", :size 6}
 {:name "left-kidney", :size 1}
 {:name "right-kidney", :size 1}
 {:name "left-hand", :size 2}
 {:name "right-hand", :size 2}
 {:name "right-knee", :size 2}
 {:name "left-knee", :size 2}
 {:name "right-thigh", :size 4}
 {:name "left-thigh", :size 4}
 {:name "right-lower-leg", :size 3}
 {:name "left-lower-leg", :size 3}
 {:name "right-achilles", :size 1}
 {:name "left-achilles", :size 1}
 {:name "right-foot", :size 2}
 {:name "left-foot", :size 2}]