"Just finished language 1: Ruby! Having a "missing_method" option is inspired (so inspired that it appeared in .NET 4) -- using it to convert roman numerals to number is pretty cool.
The language feels like it would be great for scripting, and probably safer than PHP; can't imagine writing a large web app in it, though."
I guess it could be useful for some DSLs (great tease/example in the book) -- but, being able to "break" the language?! Not cool."
"Another, another language: this time was Prolog.
Prolog is definitely the coolest language I've encountered in this book -- really hope I can find a real world use for it (or a language like it).
Sudoku solver in 20 lines? Amazing."
"Made it through Scala (not sure if the book didn't do it justice, but I honestly don't see the point -- C# with the F# libraries is a more compelling story, in my opinion) and Erlang (seemed pretty cool).
Just getting started on Clojure -- seems a bit more tenable than Lisp so far."