[baudehlo]

That would be a bad guess. For a start, Lisp is not a functional language. It just has some functional features. It has side effects.

I learned FP using Haskell, which is a pure functional language.

But I still stand by what I said. I code faster in Perl than I do in Haskell due to the availability of libraries. The "pure FP" features may make some things theoretically cleaner, but they don't honestly make things that much easier. Having access to FP features (map, grep, reduce, closures in particular) is significant, but access to built in data structures (hashes in particular) make life so much easier than C or C++ or Java.

[colomon]

I'm sure baudehlo knows, but some other readers may not: map, grep, and closures are all native in Perl 5, and reduce is easily available. (All are native in Perl 6.)

[baudehlo]

reduce is "included" - it's just in a loadable module in the core library.