Mason Wan masonwan

Screenshot

Output

Search all books which the title starts with "Survival".
========================================
Use normal query
28.2 ms
Use stored procedure

Type erasure

Genetic
Reflection
Static method

In Java, it's impossible to get current class/type in static method. The C# code would be.

// C#
public static Type GetType() {
 return MethodBase.GetCurrentMethod().DeclaringType;

Overview

This is a guide with screenshots to get the app ID, client ID, and client secret from Amazon Seller Central.

Step 1: Log in Amazon Seller Central

Go to Amazon Central and log in with your credentials.

Problem

Chrome has the feature to automatically add search engine when it detects an input field on websites. After using Chrome months, it often resutls a bunch of search engines stayed in the settings. And the setting page does not provide a convinient way to remove them.

Updates on 2024-11-21

The editting the Web Data as SQLite file did not seem to work anymore. Chrome seems to revert all the changes when restart.

To make it even worse, it seems that the DOM tree is not accessable from the development console on the setting page, so even a bookmarklet could not work. Neighter does Chrome provide an API to access the search engines.

FFmpeg

A list of useful ffmpeg commands

See the video meta data

ffprobe video.mp4

	# From <http://blogs.msdn.com/b/powershell/archive/2007/06/19/get-scriptdirectory.aspx>
	function Get-ScriptDirectory {
	$Invocation = (Get-Variable MyInvocation -Scope 1).Value
	Split-Path $Invocation.MyCommand.Path
	}

	$dir = Get-ScriptDirectory
	$cmd = $dir + '\bin\mysqladmin.exe'
	& $cmd -u root shutdown

	#! /bin/bash

	for isBold in {0..1}; do
	for background in {40..47}; do
	for foreground in {30..37}; do
	colorTag='\e['$isBold';'$foreground';'$background'm'
	colorResetTag='\e[0m'
	text=$colorTag'isBold:'$isBold' foreground:'$foreground' background:'$background$colorResetTag
	echo -e $text
	done

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Title</title>
	<script type="text/javascript">
	let element

	console.log(`Registering window error`)