Little Lambda

A mini Lambda calculus interpreter in JavaScript. Supports function invocation, lambda, and let.

"let" is like Common Lisp's "let*". The assignments are done serially, not in parallel.

• By Thomas Cowart

• http://tncow.art

• georgemcfly@gmail.com

• Based on LittleLisp Mary Rose Cook

• https://maryrosecook.com

• mary@maryrosecook.com

Thank you to Martin Tornwall for the implementation of let.

Repl

$ node repl.js

Some runnable programs

(\ (x) (x x))

(let ((TRUE (\\ (x y) x))
      (FALSE (\\ (x y) y))
      (AND (\\ (x y) (x y x))))
     (AND TRUE FALSE))