Do you consider R as a functional and not multi-paradigm language?
If so, R has the biggest set of libraries for bioinformatics. There are many modules in CRAN, but BioConductor is what you are looking for. It as an active community and most of the libraries have been published on peer-review journals.
note: I think that apart from perl, python, and some small efforts in C/C++ and Java, no other programming language has good bioinformatics libraries at all.
