Will Braswell provides this update:
"RPerl v2.0 has been officially released, including the long-awaited automatic parallelization feature, which pushes us beyond the everyday speed of serial C++ to the bleeding-edge speed of parallel C++.
Accordingly, the following Learning RPerl sections have been added or updated:
Section 1.25.2: History Of RPerl
Section 1.26: What's New In RPerl v2.0?
APPENDIX A: EXERCISE ANSWERS (nearly all exercises, too many to list them all)