beetcb

// The if-else pattern is replaced by if-only expressions for consisitency and clarity. 

// A new JavaScript program or subprogram is executed, a initial task is created
taskQueue.enqueue(initParse())

// Event Loop
while everyTick {
	if !callstack.isEmpty() {continue}
	taskQueue.dequeue().excuteStepsByJSEngine()
	while !microTaskQueue.isEmpty() {

beetcb

// see -> https://www.typescriptlang.org/docs/handbook/2/keyof-types.html
type ExcludeUnexpectedNumIdxSigKeyof<T> = keyof T extends number
  ? keyof T
  : Extract<keyof T, string>;

type MapishMixed = { [k: number | string]: boolean };
type M = ExcludeUnexpectedNumIdxSigKeyof<MapishMixed>;  
// ^? M will be of type string | number

type MapishNumber = { [k: number]: boolean };

beetcb

// see -> https://en.wikipedia.org/wiki/Proxy_auto-config#:~:text=A%20proxy%20auto%2Dconfig%20(PAC,for%20fetching%20a%20given%20URL.

// 定义 findProxyForURL 函数，它接受初始化状态和配置文件
const findProxyForURL = (init, profiles) => (url, host) => {
  let result = init;
  const scheme = url.substr(0, url.indexOf(":"));
  do {
    result = profiles[result];
    if (typeof result === "function") {
      result = result(url, host, scheme);

beetcb

#!/usr/bin/env pwsh
# Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
# TODO(everyone): Keep this script simple and easily auditable.

$ErrorActionPreference = 'Stop'

if ($v) {
  $Version = "v${v}"
}
if ($Args.Length -eq 1) {