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Network

ifconfig
lsof
ssh
ping

Text Processing

cat
vi/vim
less \

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#!/bin/bash
# Aliases added to shell

alias vi='vim'
alias pg='ps aux|grep'
alias ll='ls -alFh'

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// This is used to check if native JavaScript methods are overridden by a third-party source

function checkObject() {
  ['assign', 'create', 'defineProperty', 'defineProperties', 'entries', 'freeze', 
   'getOwnPropertyDescriptor', 'getOwnPropertyNames', 'getOwnPropertySymbols', 
   'getPrototypeOf', 'is', 'isExtensible', 'isFrozen', 'isSealed', 'keys', 
   'preventExtensions', 'seal', 'setPrototypeOf', 'values'].forEach(method => {
    if (!Object[method]) {
      console.warn(`Object.${method} method is missing.`);
    } else if (Object[method].toString() !== `function ${method}() { [native code] }`) {  // For Safari, the code is `function ${method}() {\n    [native code]\n}`

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SHA1 Generator

http://www.sha1-online.com/

JSON Parser

http://json.parser.online.fr/

App Icon Generator

Drag in an image file, automatically generates icons for iPhone/Mac/Android of all sizes.

https://appicon.co/

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Smart Pointer

How to implement a smart pointer class which can automatically convert smart pointer of derived class to smart pointer of base class?

For example:

template <class T>
class smart_ptr { ... };

class Shape {};

class Circle : public Shape {};

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Install composer on Ubuntu

apt install composer

Install dependencies

cd laravel
composer install

Create database in MySQL

Initialize DB

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In MySQL 5.7, it uses auth_socket for authentication if we don't provide root password when installing MySQL. We can use below code to swith back to password authentication:
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'MyNewPassword';

For details, see: https://www.percona.com/blog/2016/03/16/change-user-password-in-mysql-5-7-with-plugin-auth_socket/

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const HttpProxyAgent = require('http-proxy-agent');
const proxyServer = 'http://corporate.proxy:8080';
...

    '/api': {
        target: 'http://a.b.c',
	secure:false,
    	pathRewrite: {'^/api':''},
        agent:new HttpProxyAgent(proxyServer),
    }

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1. 注册微信支付商户号
2. 购买域名并备案，然后在微信商户号中进行配置
3. 注册微信开放平台账号，申请App/网站应用，并进行开发者资质认证
4. 在微信支付商户号中关联开放平台的App ID
5. 开发对接

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void DebugOut(wchar_t *fmt, ...)
{
  va_list argp; 
  va_start(argp, fmt); 
  wchar_t dbg_out[4096];
  vswprintf_s(dbg_out, fmt, argp);
  va_end(argp); 
  OutputDebugString(dbg_out);
}