JavaScript/TypeScriptTypeScript Cancellable sleep/delay
Many websites explain how to implement sleep in TypeScript/JavaScript. It can be implemented by using Promise and setTi...
JavaScript/TypeScript
JavaScript/TypeScript
JavaScript/TypeScriptUnderstanding how to use Symbol.iterator
While I looked for an interesting programming article, I found a programming exercise. Interestingly, Symbol.iterator i...
JavaScript/TypeScriptTypeScript keyof typeof for type generation
Keyof keyof extracts property list of the target type or interface. interface Book { name: string; author...
JavaScript/TypeScriptTypeScript Make the function parameter more maintainable by using interface
Many programming languages support interface keyword. TypeScript also supports the feature. This is one of the importan...
JavaScript/TypeScriptTypeScript Utility types defined with infer keyword
infer keyword is one of the difficult features that TypeScript offers. Some utility types use infer keyword, so let's l...
JavaScript/TypeScriptTypeScript How to set a default value with Interface
Interface is a powerful feature supported by many programming languages. However, if we want to set a default value, we...
JavaScript/TypeScriptnode-serialport throws “File not found” error for a certain device when using USB-COM interface
I needed to use node-serialport to use a scanner for my project. I have two scanners. One of them works fine but anothe...
JavaScript/TypeScriptImplement IoT State Machine Transition By State Pattern In TypeScript
In my project, my team needed to implement State machine. One of the developers implemented it by using many if-else bu...
JavaScript/TypeScriptA good way to write our own Node-RED node for the testability
I have used Node-RED for more than 3 years for my working project. I came up with a good idea to write our own node for...
JavaScript/TypeScriptObject Type Check By User Defined Type Guard with Record Type
I wrote the following article before. When we want to access a property of an object, we must somehow tell the...