bmeck

#!/usr/bin/env node
// call using --inspect brk, GC using memory tab of devtools
// call globalThis.tick() to move the code along and see when things reap from
// manually calling GC
{
  const registry = new FinalizationRegistry((_) => console.log(_, 'reaped'));
  let EASY_TO_FIND = class EASY_TO_FIND2 {
    big = new Uint8Array(1024 * 1024 * 10);
    constructor(_) {
      registry.register(this, _);

bmeck

function foo(x, y) {
  return Object;
}
const { stop } = trace();
new foo([1], new Date());
stop();


// boilerplate after this

bmeck

# see the replacement character ( Buffer.from(new TextEncoder().encode('\u{fffd}')) ) instead
# https://en.wikipedia.org/wiki/Specials_(Unicode_block)#Replacement_character
node -e 'process.stdout.write("👌"[0]);setTimeout(() => {process.stdout.end("👌"[1]); process.exit()},3e3)' |
  node -e '(async (s = "") => {for await (const a of process.stdin) {console.log(a); s+= a}; console.log(s)})()'

bmeck

{
  "type": "object",
  "title": "Node.js Policy Manifest",
  "description": "https://nodejs.org/api/policy.html",
  "definitions": {
    "cascade": {
      "defaultSnippets": [
        {
          "label": "Allow scope fall through.",
          "body": true

bmeck

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http://0301244.hatenablog.com/
http://0316shank.hatenablog.com/
http://03310711.blog59.fc2.com/
http://04-09.gaidline.media/

bmeck

'use strict';
const readOnlyViews = new WeakMap();
function ReadOnlyProxy(target) {
  if (!canBeAProxyTarget(target)) return target;
  if (readOnlyViews.has(target)) return readOnlyViews.get(target);
  /**
   * @type {()=>never}
   */
  function fail() {
    throw new Error('cannot mutate a read only view');

bmeck

import inspector from "inspector";

const url2scriptid = new Map<string, string>();

const session = new inspector.Session();
session.connect();

setupDebugger();

function setupDebugger() {

bmeck

const loop = Machine({
  context: { x: 3 },
  initial: 'while (x > 0)',
  states: {
    "while (x > 0)": {
      on: {
        EVAL: [
          {
            target: "x--",
            cond(ctx, evt) {

bmeck

const workflow = Machine({
  id: "workflow",
  initial: "running",
  states: {
    running: {
      id: "file",
      type: "parallel",
      states: {
        upload: {
          initial: "idle",

bmeck

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions