pianoboy (6) [Avatar] Offline
#1
The line :
scala> val listB = 40 :: tens

Should be:
scala> val listB = 40 :: listA
aslam.khan (50) [Avatar] Offline
#2
Re: P46 Experiment With List
Yes, that's me proof reading badly smilie

It's already corrected in the latest version to be released soon.