•ParseFloat in JS

1 files changed, 7 insertions, 1 deletions

diff --git a/docs/bqn.js b/docs/bqn.js
index 795f4fba..105f16f8 100644
--- a/docs/bqn.js
+++ b/docs/bqn.js
@@ -660,6 +660,12 @@ let primitives = dynsys(state => {
   return list(gl.map((g,i) => list([g,rt[i]])));
 });
 
+let parsefloat = (x,w) => {
+  let n = req1str("•ParseFloat",x,w);
+  if (! /^-?(\.[0-9]+|[0-9]+\.?[0-9]*)([eE][-+]?[0-9]+)?$/.test(n)) throw Error("•ParseFloat: invalid float format");
+  return parseFloat(n);
+}
+
 let isint = n => isnum(n) && n===(n|0);
 let isnat = n => isint(n) && n>=0;
 let fact = (x,w) => {
@@ -781,7 +787,7 @@ let rand = (() => {
 let sysvals = {
   bqn:dynsys_copy(makebqnfn("•BQN",r=>run(...r))), rebqn, primitives,
   type, glyph, decompose, fmt:fmt1, repr, currenterror, unixtime,
-  js:dojs, math:mathns, ns:nsns, rand,
+  js:dojs, parsefloat, math:mathns, ns:nsns, rand,
   listsys: dynsys(_ => list(Object.keys(sysvals).sort().map(str)))
 };