conartist6

                                                            ┌───────────────┐
                                                            │  Expression   │
                                                            │  root: true   │
                                                            │ globalIdx: 1  │
                                                            └───────┬───────┘
                                                          parentSeq │ ▲
                                                                    │ │ expr
                                  ┌──────────────┐          ┌───────┴─┴─────┐
                                  │    State     │          │    State      │
                                  │  type: cont  │          │ type: success │

conartist6

Before

                                                            ┌───────────────┐
                                                            │  Expression   │
                                                            │  root: true   │
                                                            │ globalIdx: 1  │
                                                            └───────┬───────┘
                                                          parentSeq │ ▲
                                                                    │ │ expr
                                  ┌──────────────┐          ┌───────┴─┴─────┐

conartist6

class Builder {
  *ensure(...tokens) {
    for (const token of tokens) {
      yield* token.type === 'Thunk' ? token.ensure(this) : this.advance(token);
    }
  }

  *allow(...tokens) {
    for (const token of tokens) {
      yield* token.type === 'Thunk' ? token.allow(this) : this.advance(token, true);

conartist6

function sum(arr) {
  let acc = 0;
  for (let i = 0; i < arr.length; i++) {
    acc += arr[i].val;
  }
  return acc;
}

const array1 = [];
const array2 = [];

conartist6

Node packages usually ship with scripts that are useful to developers. Common scripts might be build, test, or lint, but you will need to look inside the package.json file to see what scripts are actually available for a particular package. Here is what a common package with a build script might look like:

{
  "name": "my-package",
  "version": "0.1.0",
  "scripts": {
    "build": "transpile -f lib/index.ts -o /lib/index.js"
  },
 "devDependencies": {

conartist6

function* range(end) {
  for (let i = 0; i < end; i++) {
    yield i;
  }
}

const a = Array.from(range(65536));

module.exports['for await..of values from one chunk'] = {
  fn: async function(deferred) {

conartist6

Input:

if (foo) {
  // comment
}

Traversal log

conartist6

export class Coroutine {
  constructor(generator) {
    this.generator = generator[Symbol.iterator]();
    this.current = this.generator?.next();
  }

  get value() {
    return this.current.value;
  }

conartist6

console.time('new Set');
for (let i = 0; i < 1_000_000; i++) {
  new Set();
}
console.timeEnd('new Set');

console.time('new Map');
for (let i = 0; i < 1_000_000; i++) {
  new Map();
}

conartist6

import { Grammar } from '@cst-tokens/grammar';
import { objectEntries } from '@cst-tokens/helpers/iterable';
import { eat, match } from '@cst-tokens/helpers/commands';
import { capture, ref, PN } from '@cst-tokens/helpers/shorthand';

// 2-+2+-2
/*
$capture = '2';
$node = { type: 'Digit', value: $caputure };
$capture = '-';