a tiny "lisp" i made for fun
============================

supports variables (with the set function), numbers, addition, and lambdas
however, no quotes, eval/apply, or any of that truly lispy stuff

P=s=>eval(`[${s.replace(/[^()\s]+|\S/g,s=>s=="("?"[":s==")"?"],":`"${s}",`)}]`)[0];
L=(s,e)=>e.s[s]||e.p&&L(s,e.p);
E=(s,e)=>s.map
 ?s[0]==="set"?e.s[s[1]]=E(s[2],e)
  :s[0]==="lambda"?(...a)=>{f={p:e,s:{}};s[1].map((x,i)=>f.s[x]=a[i]);return E(s[2],f)}
  :E(s[0],e)(...s.slice(1).map(x=>E(x,e)))
 :s==="+"?(...a)=>a.reduce((x,y)=>x+y):!isNaN(s)?+s:L(s,e);
//rls=require("readline-sync");e={s:{}};while(s=rls.question("> "))console.log(E(P(s),e));//for running with nodejs

shift+enter to eval

~/languages/tinylisp.html