Wy Lee (Page 2)

Wy Lee

Sign in Subscribe

Intro of JPA, Hibernate, and ORM

I am writing this article to recap my learning on JPA and Hibernate,as recently I am building my project with this framework. And Hibernate, also a framework to speed up and simplify the process of database connection, is a solution to ORM. Traditionally we use JDBC to implement SQL

Communication in Web application

This article is to record my learning on some basic knowledge about the Internet, especially how the web apps communication with each other. I am doing this because I am reviewing my previous projects and find there are some knowledge I can more focus on rather than just many implementations

Short Circuit: &&, || operator

Short Circuit has two operators, && and II, this article is to introduce its difference between the single operator. boolean result = (false && true); // Because the first result is false, right side will not be evaluated. boolean result = (true || false); // result is true // Same as the or operator.

Data Structure: Overview of List, Set and Map Interface

This post is to record my learning on Data structures in Java. I still remember when I first learned this concept, I felt there were so many things to memorize, so I tried to learn it through understanding. Here is a summary of what I learned about the List, Set,

Focus on the Core of the Product

A couple of days ago I saw a video of the Enginneering team member at WhatsApp sharing her story, and I feel I learn a lot. This makes me think that I can write some articles about the videos that I have seen on Youtube that are of great learning

Intro of SQL injection

This article is a recap of SQL Injection, including the purpose of this attack method and attack examples, as well as ways to prevent SQL Injection. In addition, at this stage I focus on the combination of Java and SQL, so I will mention it a bit. Introduction of SQL

Linux: Intro and Installation

This article is to record my learning on Linux, including Linux's introduction on different versions and installation. Introduction Linux is an open-source software and a very reliable operating system. In order to allow more users to access Linux, many companies and non-profit groups have integrated Linux and added

Switch statement and its use scenario

To review some of the features of switch statement in Java, which is part of the Java foundamental concept, I am writing this article. Also I will introduce it's enhanced statement after Java12. The basics of a switch statement consist of the following: * switch: the statement. * case: how

The Life of Subtraction

Recently I saw a concept: The Life of Subtraction, which is to lower your expectations for things. I feel very touched. These expectations for things include relationships, material things, achievements, or any uncontrollable things, which are the life philosophy that to reduce stress and find what really matters in your

Git flow and Common Git command

This article is mainly used to record two parts for my experience using git. The first is the commonly used Git Command, and the second is the process of Git Flow. There are two reference materials that I am learning from and I think is good here. 1. 為你自己學 Git

SQL join : impact on Performance

This article is to record my learning on different join syntax on SQL and the performance how we select these. The join syntax can obtain data from multiple tables, and when it comes to inner join , left join and right join to obtain data from to relational tables, use inner

Plan for Feb 2024

This article is to record my reflections on January and to plan for February. I felt that I often overestimated the efficiency of execution. This is why I started to transfer the self-planning part of Notion to the ghost blog. The purpose of this is to: 1. Take my commitments

Redefine the question of life

I recently read a book called 'Designing Your Life: How to Build a Well-Lived, Joyful Life.' and it has prompted me to reevaluate the purpose and imagination of my ideal lifestyle. I find the topic explored in this book quite complex. Growing up in Taiwan, we were encouraged

Reviewing the Clean Code in JavaScript

A couple of days ago I read about the Clean Code in JavaScript which the author James Padolsey shared about his idea of how a clean code should be in JavaScript. At this stage, I'm probably more familiar with Java than JavaScript, but I think there are a

Cookie and Session

This article is to record my learning about the Cookie and the Session on the development of web application. Session A sessions is a way to store user information across multiple pages or visits to a website. It allows the server to identify the user and maintain their status, such

Java Jmeter test

Over the weekend, I learned about the load testing using JMeter to assess whether our API calls could withstand heavy usage. Steps of Implementation Download 1. Download Jmeter, select any file in Binaries 2. Unzip the entire folder to the desired path Configuration 3. Execute bin/jmeter.bat file 4.

Purposes of Writing

I am writing this for several purposes. 1. to record my life 2. to take note of what I have learned 3. to clearify my thoughts and make meaningful output to the world There are tons of good things and ideas that are happening around us, and also some controversial