does anyone know about the book how o think like a computer scientist?

[malik]

does anyone know about the book how o think like a computer scientist?
has anyone read it if so could you help me with chapter 5 fruitfull
functions? it has instantly become my favorite book and i've spent
lots of money on books. bu i think chapter five may have been a bit
umm rushed through? well you never really understand anyways. could
someone walk along with me? hehehe

thanks