Parsing JSON using jq
Parse JSON using jq in the bash command line.
Recent Posts
Upgrade A Spring Boot Project from 2.0 to 2.1
Upgrade Java, Spring Boot, Gradle, Flyway, etc.
How to Insert a Column in PostgreSQL
Insert (not add) a column in PostgreSQL is quit a mission.
Got Spring Professional Certificated at Aug 2019
Got Spring Professional Certificated at Aug 2019
Java Enum and How to Persist It
Should use enums any time you need to represent a fixed set of constants.
What Is the Jsessionid in Your Spring App URL
Why does Spring Boot append JsessionId in your URL and how to stop it?
Java Bean VS Spring Bean
A Java object can be a JavaBean, a POJO and a Spring bean all at the same time.
Session is Lost in Session Scope Controller in Spring MVC App
Why is my session lost and created as new in every servlet request?
NPM Semantic Versioning
We should tag projects like NPM does.
Spring Security in Spring Certification
Spring Security in Pivotal Spring Professional Certification (6%).
Spring OAuth2 Notes
Spring Security, little effort, hunge confusion.
Spring RestTemplate 101
Spring RestTemplate 101.
Java Long Value Cacheing
The cache size may be controlled by -XX:AutoBoxCacheMax=<size> option.
Delete and Create Records Violates Constraints in Spring Data Jpa
Still haven’t find a decent answer in StackOverFlow.
IDEA IntelliJ Config for Java Projects
IDEA IntelliJ Config for Java
Spring Testing in Spring Certification
Spring test in Pivotal Spring professional certification (4%).
How to use Mockito
In Mockito Answer, we mock the process.
Spring REST in Spring Certification
Spring REST in Pivotal Spring professional certification (6%).
Spring MVC in Spring Professional Certification
Spring MVC in Pivotal Spring professional certification(8%).
Spring Data Management in Spring Certification
Spring Data Management in Spring Professional Certification (16%).
Spring AOP in Spring Certification
Spring AOP in Spring Certification(8%).
Converting Java Date Time
Converting Java Date Time painlessly.
Spring Boot in Spring Professional Certification
Spring Boot in Pivotal Spring professional certification (32%).
Spring Core in Spring Certification
Spring Core in Spring Certification (20%).
Opinionated Final Variables in Java
I use final whenever it is appropriate.
Returning JSON in Spring Boot
Converting Json in Spring projects.
Searching Text Using grep in Linux
How to search text in your files in Linux?
Flex Box Basic
Get out of nightmare that positioning elements with CSS.
Return Early and Give up Single Exit Point
return early and give up single exit point
Using Pipes Within ngModel on Input Elements in Angular
Got an error: Cannot have a pipe in an action expression.
JSON Manipulation with Javascript
{“quote”:”You miss 100% of the shots you don’t take.”,”author”:”Wayne Gretzky”}
Learn Test-Driven Development (TDD) from Uncle Bob
The jury is in. The controversy is over. The debate has ended. The conclusion is: TDD works.
Build A 360 Photo View Page
Handle and view a 360 photo.
Lombok in Spring
Lombok makes Java prettier, and your life easier.
Spring Data JPA Basic
Additional capabilities beyond core spring and JPA.
Concatenating Java Strings
Behavior of String literals is very confusing.
Filenames That Cross Platforms
The most conservative file naming conventions provide the most cross-platform compatibility.
Why Some Code Needed To Be Synchronized
I found one of my old notes… But still need to do more investigation. // todo
Setup a simplest Spring Project Demo Project
A Spring Demo project. See: https://github.com/digitalsonic/geektime-spring-family
Jest, Javascript unit testing
Unit Testing in JavaScript
Beginning AWS, Why and How
AWS does everything. This the first step.
How to Submit a Form
Submits user’s data and sends data to a server.
How to Pass OCAJP Swiftly
I have no idea. It takes efforts.
Prepare for OCAJP, (6)
Exceptions.
Prepare for OCAJP, (5)
Design classes.
Prepare for OCAJP, (4)
Methods and Encapsulation.
Prepare for OCAJP, (3)
String and some common APIs.
Prepare for OCAJP, (2)
Java Operators and Statements.
Prepare for OCAJP, (1)
Java Building Blocks.
JDBC 101-ish
JDBC is an API for connecting and executing queries on a database. Relatively low-level, it’s the foundation of most ORMs and other high-level data access l...
Create Couch Views in Spring
CouchDB is one of NoSQL database, uses JSON to store data, Javascript as its query language using MapReduce, and Http for an API.
Java Constructors 101
The method that constructs your object.
Linux Basic Commands for Files and Directories
Essential commands to manipulate files and directories on Linux.
Use cURL to Transfer Data
cURL is a command line tool for getting or sending files using URL syntax.
Everyday PSQL Commands
PostgreSQL Cheat Sheet.
Vim Editor 101
How to quit vim? - -!
How to Debug PHP Code
There must be a better way. But this is the one I’m currently using.
What I Did After Updating Database by Mistake?
So sorry that I falsely updated the database with the following script:
Types of Software Testing
Test makes perfect.
How to Migrate SSRS Reports from One Server to Another?
Watch my Youtube video to get details!
Thinking in jQuery
jQuery, live long and prosper!
SQL Server Configuration
These are my notes while using SQL Server 2016.
Understanding SQL Server Connection Strings
SQL Server Connection Strings.
How to Find Free Programming Resources
Free Programming Resources.
How to Create a Simple Flowchart
A simple flowchart representing a process for dealing with a non-functioning lamp.
Two Ways of Creating a Github Repository
Creating Github repo from either remote or locally.
How to Test Jekyll Website Locally
Preview your site and help troubleshoot failed Jekyll builds.