Matthew Stevens mattgstevens

laws of computer programming

any given program, when running, is obsolete.
if a program is useless, it will have to be documented.
if a program is useful, it will have to be changed.
any program will expand to fill all available memory.
the value of a program is proportional to the weight of its output.
program complexity grows until it exceeds the capability of the programmer to maintain it.
make it possible for programmers to write in english and you will find that programmers cannot write in english.

rules of pratt

This API was removed in React 17

Interaction tracing with React

React recently introduced an experimental profiler API. After discussing this API with several teams at Facebook, one common piece of feedback was that the performance information would be more useful if it could be associated with the events that caused the application to render (e.g. button click, XHR response). Tracing these events (or "interactions") would enable more powerful tooling to be built around the timing information, capable of answering questions like "What caused this really slow commit?" or "How long does it typically take for this interaction to update the DOM?".

With version 16.4.3, React added experimental support for this tracing by way of a new NPM package, scheduler. However the public API for this package is not yet finalized and will likely change with upcoming minor releases, so it should be used with caution.

A series of posts on css-in-js

0. styles as objects

First, an exercise. Can we represent all of css with plain data? Let's try.

let redText = { color: 'red' };

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

The link in the table of content jumps at the copy of the answer on this page.
The link on the answer itself points back at the original post.

Table of Content

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

Design rules

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

	name: Security audit
	on:
	schedule:
	- cron: '0 0 * * *'
	push:
	paths:
	- '**/Cargo.toml'
	- '**/Cargo.lock'
	jobs:
	security_audit:

	// zooming squares. by dave

	int[][] result;
	float t, c;

	float ease(float p) {
	return 3pp - 2pp*p;
	}

	float ease(float p, float g) {

	/***
	* Shoutouts:
	*
	* Bytecode origin https://www.reddit.com/r/ethereum/comments/6ic49q/any_assembly_programmers_willing_to_write_a/dj5ceuw/
	* Modified version of Vitalik's https://www.reddit.com/r/ethereum/comments/6c1jui/delegatecall_forwarders_how_to_save_5098_on/
	* Credits to Jorge Izquierdo (@izqui) for coming up with this design here: https://gist.github.com/izqui/7f904443e6d19c1ab52ec7f5ad46b3a8
	* Credits to Stefan George (@Georgi87) for inspiration for many of the improvements from Gnosis Safe: https://github.com/gnosis/gnosis-safe-contracts
	*
	* This version has many improvements over the original @izqui's library like using REVERT instead of THROWing on failed calls.
	* It also implements the awesome design pattern for initializing code as seen in Gnosis Safe Factory: https://github.com/gnosis/gnosis-safe-contracts/blob/master/contracts/ProxyFactory.sol

	// note : if you're on github gist and want to copy paste this code, you can click on the "Raw" button
	// and then do Ctrl A, Ctrl C, Ctrl V
	// (code below by Kurt Spencer, slightly modified code to run as Processing tab)
	// maybe you should rather use this new (improved) version of the noise instead : https://github.com/KdotJPG/OpenSimplex2

	/*
	* OpenSimplex Noise in Java.
	* by Kurt Spencer
	*
	* v1.1 (October 5, 2014)