free_one_ michael-azogu

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

I've been deceiving you all. I had you believe that Svelte was a UI framework — unlike React and Vue etc, because it shifts work out of the client and into the compiler, but a framework nonetheless.

But that's not exactly accurate. In my defense, I didn't realise it myself until very recently. But with Svelte 3 around the corner, it's time to come clean about what Svelte really is.

Svelte is a language.

Specifically, Svelte is an attempt to answer a question that many people have asked, and a few have answered: what would it look like if we had a language for describing reactive user interfaces?

A few projects that have answered this question:

HTTP Streaming (or Chunked vs Store & Forward)

The standard way of understanding the HTTP protocol is via the request reply pattern. Each HTTP transaction consists of a finitely bounded HTTP request and a finitely bounded HTTP response.

However it's also possible for both parts of an HTTP 1.1 transaction to stream their possibly infinitely bounded data. The advantages is that the sender can send data that is beyond the sender's memory limit, and the receiver can act on

Hi, I'm mcpower. I've done Advent of Code seriously for two years now in Python, placing 9th in 2018 and 12th in 2017. This year, I'm taking a break from aiming for the leaderboard - while it's fun and all, it is a bit stressful at times (the good kind of stress, though!). As such, I'd like to share a few tips for anyone wanting to aim for the leaderboard.

This is everything that worked for me. Your mileage may vary, though - don't take this as gospel, see what works for you.

Go fast

Go fast.

Web Framework Render Functions

A look at the different render functions created by different web-frameworks, for the same website.

Website is very minimal:

A large rectangle than can recursively render 9 more rectangles inside it
Can navigate around the rectangles (Cells) using the keyboard

Vanilla.js demo https://gistpreview.github.io/?154fa3d4a17c3e124eb9ea0e7b69ae1d/z_vanilla.html

Pure ESM package

The package that linked you here is now pure ESM. It cannot be require()'d from CommonJS.

This means you have the following choices:

Use ESM yourself. (preferred)
Use import foo from 'foo' instead of const foo = require('foo') to import the package. You also need to put "type": "module" in your package.json and more. Follow the below guide.
If the package is used in an async context, you could use await import(…) from CommonJS instead of require(…).
Stay on the existing version of the package until you can move to ESM.

	(() => {
	function MappedYieldGenerator(generator, mapYield) {
	return function*() {
	const gen = generator();
	let genResult;
	let resolvedValue;
	do {
	genResult = gen.next(resolvedValue);
	resolvedValue = yield mapYield(genResult.value);
	} while (!genResult.done);

	import {
	Dimensions,
	LayoutChangeEvent,
	Platform,
	ScrollEvent,
	ScrollView,
	StyleSheet,
	View,
	} from "react-native";
	import {Font, Space} from "../atoms";

	<!DOCTYPE html>
	<head>
	<meta charset="UTF-8">
	</head>
	<body>
	<div id="canvas"></div>
	<button id="restart">Restart</button>
	<script src="minesweeper.js"></script>
	<style>
	* {

	export class Cache<T extends object, K> {
	items = new WeakMap<T, K>()

	get<P extends T>(item: P, cb: (item: P) => K) {
	if (!this.items.has(item)) {
	this.items.set(item, cb(item))
	}
	return this.items.get(item)!
	}