Zheng Lai z2lai

The provided TypeScript code defines a utility type RecursivePartial. This type is used to create a version of an existing type, but with all of its properties (and their nested properties) made optional and able to be partially provided.

The RecursivePartial type is defined as a mapped type that iterates over all properties (Prop) of a given type (Type):

export type RecursivePartial<Type> = {
  [Prop in keyof Type]?: ...
};

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

Sass Architecture Structure

sass/
|
|– base/
|   |– _reset.scss       # Reset/normalize
|   |– _typography.scss  # Typography rules
|   ...                  # Etc…
|

	import React, {useCallback, useRef} from 'react'

	function useHookWithRefCallback() {
	const ref = useRef(null)
	const setRef = useCallback(node => {
	if (ref.current) {
	// Make sure to cleanup any events/references added to the last instance
	}

	if (node) {

	[T]he difference between a bad programmer and a
	good one is whether he considers his code or his
	data structures more important. Bad programmers
	worry about the code. Good programmers worry about
	data structures and their relationships.
	-- Linus Torvalds
	~~~
	Clarity and brevity sometimes are at odds.
	When they are, I choose clarity.
	-- Jacob Kaplan-Moss