JavaScript/TypeScript How to implement Node-RED node in TypeScript
The official site describes how to implement our own node in JavaScript. However, I don't find a page for TypeScript. I'...
JavaScript/TypeScript 
JavaScript/TypeScript Complete Class Guide in TypeScript
Class is one of keys to be familir with Object Oriented Programming (OOP). Multiple variables and functions are in the s...
JavaScript/TypeScript TypeScript Bracket notation causes index signature error
TypeScript shows an error when we access an object with brackets like obj to get the value. How can we safely resolve it...
JavaScript/TypeScript 8 ways to remove duplicates from Array in TypeScript
This page shows 8 ways to remove duplicates from an array. It also compares the performance to be useful to decide which one to use for your case. It also covers the case where the element is object.
JavaScript/TypeScript How to generate Number Range Array in TypeScript
This post shows how to implement range function. It supports not only integer type but also floating type as well as ascending and descending order. Even if you need too big/small numbers, it can handle them by log notation.
JavaScript/TypeScript String concat in JavaScript Performance Comparison
JavaScript offers several ways to concatenate strings. Let's learn how to concatenate strings and which one is the best ...
JavaScript/TypeScript Making your code more abstract by Generics in Typescript
Our code gets more readable if we make it more abstract. We don't need to know how they work as long as it works. Many u...
JavaScript/TypeScript Extends interface and type in typescript
We often need to build similar structures in different objects. Some functions require the same variables but want to ha...
JavaScript/TypeScript Efficient Null Handling in Typescript
Null check in many places is tedious. This post shows you how to reduce such work in a nice way.
JavaScript/TypeScript Typescript enum get value by key and key by value
Explains how to get value by key, get key by value, and use an enum as an object key. Some functions don't behave as expected when an enum has number values or mixed type data. All enum-related solutions are on this page.