[kazinator]

TXR Lisp is a dialect that has decent features for munging text. It's part of a two-language combination called TXR; the other language is the TXR Pattern Language: a notation for matching small and large scale structures in text documents and streams.

TXR Lisp allows various classic Lisp operations to also be used on vectors and strings (think car, cdr, mapcar* and numerous others). It has array referencing that support Python's negative index convention. Sequence subranges are assignable places, so if s holds "firetruck" then (set [s 1..-1] "lic") changes s to "flick".

TXR Lisp is loaded with useful features, all packed into a small executable accompanied by a small library of Lisp files.