[Chapter 15], AVL Trees, Single Rotation, RotateLeft and RotateRight write up and functions

[nwamugo]

The write-up under Rotate Left seems not to be talking about Rotate Left.
Then, at Rotate Right, the write-up is the same. One can infer that at least one of the two write-ups is wrong.

Likewise, the methods that follow are not clear as they do not follow the preceding write ups. Perhaps for each line, if you printed out the output, one can see how everything comes together

For example

var valueBefore = this.value; // please print out
var rightBefore = this.right; // please print out