Other techs PowerShell Try-Catch-Finally error handling
While coding in PowerShell, error handling is necessary. Even though the code is small enough, we want to know why it fa...
Other techs 
Other techs PowerShell Install msi silently
PowerShell. I sometimes need to use it. Whenever I use it, I have to google it to know how to do it.This time, I needed ...
JavaScript/TypeScript Understanding how to use Symbol.iterator in JavaScript/TypeScript
Symbol.iterator can be used to initialize the iterator. If you need to go back to the first element after the iterator goes forward, it's the right place to use it. This post shows the example.
JavaScript/TypeScript TypeScript keyof typeof for type generation
keyof extracts the keys of an interface or type and can be used to generate a new type. typeof generates a type from an object. The combination of keyof and typeof can generates a type from an object.
JavaScript/TypeScript TypeScript 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 important...
JavaScript/TypeScript TypeScript 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 le...
JavaScript/TypeScript TypeScript How to set a default value with Interface
This page shows 3 ways to set default values to an interface. Using Spread Operator is an easy way. You can also define the default values in a function. An advanced way is to create a class for it.
JavaScript/TypeScript node-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 another...
JavaScript/TypeScript Implement 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 but...
JavaScript/TypeScript A 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 ...