Tlen Lisp Updated Page

(let !counter 0 (each! [1 2 3] (fn [x] (set! counter (+ counter x)))) counter) ;; returns 6 The ! is a visual signal — no hidden side effects. Type systems are great, but they can interrupt flow. Tlen introduces soft types — optional, gradual, and runtime-erasable . You can add them when you need confidence, ignore them when prototyping.

Have you tried Tlen? What’s your favorite “modern Lisp”? Let me know in the comments. tlen lisp

I’ll admit it — I’m a sucker for Lisp dialects. Over the years, I’ve spent countless hours with Common Lisp, Clojure, Racket, and even Emacs Lisp (begrudgingly, at times). So when I stumbled across Tlen Lisp — whose name comes from the Polish word for “oxygen” — I was curious. Another Lisp? Really? is a visual signal — no hidden side effects

(defn add [x : Int, y : Int] -> Int (+ x y)) But this also works: You can add them when you need confidence,