Technical Feeder

Nested class or inner class in Typescript

Inner class or nested class can be defined if you assign a class with an equal operator. Another way is to define a function that returns an object. If you call the function somewhere, the object can be handled as a class.

2021.06.24

JavaScript/TypeScript

Is Map object faster than if-else and switch?

Using map object is useful to replace switch-case or if-else that can easily be long lines. It improves the readability but how about the performance? Is it faster than switch-case and if-else? Let's compare the difference!

2021.06.22

JavaScript/TypeScript

Why is refactoring your code important?

Refactoring is the process to make existing code beautiful by restructuring it. It doesn't add features and change its b...

2021.06.20

Tips

Node-RED node test fails when using sinon.useFakeTimer

Node-RED test fails when replacing timer related functions. Our own node derives Node-RED node and it calls setImmediate...

2021.06.18

JavaScript/TypeScript

Self learning guide to be a good programmer

Do you want to start learning programming? Do you want to improve your programming skills but don't know what to do or i...

2021.06.16

Tips

Building dev infrastructure with docker

It is getting major to use cloud service to store source code but there are still many cases to build infrastructure in ...

2021.06.12

Docker

5 Refactoring techniques that you can immediately apply

Many software developers want to know techniques that they can immediately apply to make their code readable. A function...

2021.06.08

JavaScript/TypeScript

Keeping high-performance brain and healthy

Coding requires concentration. If we are tired code would be less readable. Without concentration, it is easy to add new...

2021.06.04

Health

Advanced state machine pattern

I recently implemented logic to provide state machine info. At first I didn't implement it by State pattern but I felt i...

2021.03.15

JavaScript/TypeScript

Linear Regression for Machine Learning Beginners

The purpose of this post is to understand how linear regression works in order to start learning Machine Learning. Linea...

2021.03.02

Python