This is my attempt at solving Programming Praxis problems using golang.
golang; I've used 1.10.3.
Put the project in a folder named programmingpraxis inside $GOPATH/src and then run:
go build programmingpraxis/cmd/rpncalculator
go build programmingpraxis/cmd/rpncalculator
go install programmingpraxis/cmd/rpncalculator
$GOPATH/bin/rpncalculator