huang-x-h

ewXapR

A Pen by huang.xinghui on CodePen.

License.

huang-x-h

function defaultHasher() {
    return JSON.stringify(arguments);
}

function asyncMemoize(fn, hasher=defaultHasher) {
    async function memozie() {
        let cache = memozie.cache;
        const key = hasher(arguments);

        if (!cache.hasOwnProperty(key)) {

huang-x-h

function createArrayIterator(coll) {
  var i = -1;
  var len = coll.length;
  return function next() {
    return ++i < len ? {value: coll[i], key: i} : null;
  }
}

function eachLimit(coll, limit, iteratee) {
  if (limit <= 0 || !coll) return Promise.resolve();

huang-x-h

Unix Crontab

Introduction

cron is a utility that you can use to schedule and automate tasks. By defining items in the cron table, called crontab, you can schedule any script or program to run on almost any sort of schedule. For example, Research [Flagship Merchant Services][1] on Thursday at 6:30pm.

For example, run a [program][2] each day 5 minutes after midnight on mondays, wednesdays and fridays. Or schedule something to run every five minutes, or once a month.

Basics

huang-x-h

// 摘自Secrets of the JavaScript Ninja
function argumentNames(fn) {
    var found = /^[\s\(]*function[^(]*\(\s*([^)]*?)\s*\)/.exec(fn.toString());
	return found && found[1] ? found[1].split(/,\s*/) : [];
}

argumentNames(function(x){})[0] === "x"

huang-x-h

// 摘自http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
function globalEval(data) {
    data = data.replace(/^\s*|\s*$/g, "");
    if (data) {
        var head = document.getElementsByTagName("head")[0] ||
                        document.documentElement,
                script = document.createElement("script");
        script.type = "text/javascript";
        script.text = data;
        head.appendChild(script);

huang-x-h

// 摘自Secrets of the JavaScript Ninja
Function.prototype.partial = function() {
    var fn = this, args = Array.prototype.slice.call(arguments);
    return function() {
        var arg = 0;
        for (var i = 0; i < args.length && arg < arguments.length; i++) {
            if (args[i] === undefined) {
                args[i] = arguments[arg++];
            }
        }

huang-x-h

curl -w "TCP handshake: %{time_connect}, SSL handshake: %{time_appconnect}\n" -so /dev/null https://www.alipay.com

#上面命令中的w参数表示指定输出格式，timeconnect变量表示TCP握手的耗时，timeappconnect变量表示SSL握手的耗时（更多变量请查看文档和实例），s参数和o参数用来关闭标准输出。
#摘自http://www.ruanyifeng.com/blog/2014/09/ssl-latency.html

huang-x-h

# 查看当前目录文件总数
find ./ -name "*.js" | wc -l 

# 查看当前目录文件总行数
find ./ -name "*.js" | xargs cat | wc -l

# 查看当前目录文件总行数，不包含空行
find ./ -name "*.js" | xargs cat | grep -v ^$ | wc -l

huang-x-h

//使g()(‘al’)返回字符串”goal”；
//g()()(‘al’)输出”gooal”；
//代码g()()()(‘al’)返回goooal;
// 各个语言版本参考链接 https://github.com/eatnumber1/goal

// 一开始自己想的一个版本
function g() {
    var stack = ['g'];

    if (arguments.length === 0) {