steveruizok

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)!
	}

tonyg

Semi-automatic Defunctionalization of Continuations

Tony Garnock-Jones. February 2016.

Abstract

Programmers use continuations to achieve all manner of interesting control effects (e.g. Shivers & Turon 2011). But common representations of continuations cause problems in practice in two ways. On one hand, continuations represented as functions are entirely opaque; the only available operation is to invoke the continuation. On the other hand, continuations represented as reified machine stacks expose too much information; irrelevant detail of the program's information becomes visible. In this paper, we present a design for a middle-ground. Using our new language construct, continuations are represented as censored reified machine stacks. Programmers precisely control the information and behavior associated with each frame in the continuation, allowing them the benefits of automatic continuation reification combined with the benefits of a defunctionalized representation of control as data.

---

linderd

Linux (Fedora 35) on a Thinkpad P14s [T14] Gen2 AMD

These are my installation-tricks and notes for running Linux on a 2021 Thinkpad P14s Gen2 with AMD Ryzen 7 5850U. It should also be suitable for the Thinkpad T14 Gen2 AMD as they are technically the same modell.
Meanwhile there is also a good test on youtube and an entry in the arch-wiki, which also comments some points mentioned here.

Detailed specs

Shipped:

mgechev

<link rel="shortcut icon" width=32px>
<canvas style="display: none" id="loader" width="16" height="16"></canvas>

<script>
class Loader {
  constructor(link, canvas) {
    this.link = link;
    this.canvas = canvas;
    this.context = canvas.getContext('2d');
    this.context.lineWidth = 2;

mlent

<ul>
  <li>
    <a href="https://twitter.com/share?text=TITLE OF YOUR POST via @YOUR_USERNAME&url=HTTPS://YOUR_WEBSITE.COM" onclick="window.open(this.href, 'twitter-share', 'width=550,height=235'); return false;">
      Share on Twitter
    </a>
  </li>
  <li>
    <a href="https://news.ycombinator.com/submitlink?u=HTTP://YOUR_URL.COM&t=YOUR CONTENT" onclick="window.open(this.href, 'hn-share', 'width=550,height=350'); return false;">
      Share on Hacker News
    </a>

romainl

Painless ESLint/Standard integration

Our goal, here, is threefold:

• use Vim's built-in features to their fullest,
• be a good project citizen even if we don't use $EDITOR_DU_JOUR,
• have a minimal but beneficial impact on the infrastructure of the project we work on.

Expose a simple interface for linting at the project level

norcalli

local trie_maker = require 'trie'

local vim = vim
local api = vim.api

local alphabet = 'abcdefghijklmnopqrstuvwxyz'
local Trie = trie_maker('.0123456789'..alphabet..alphabet:upper())
-- local Trie = trie_maker('^.0123456789'..alphabet..alphabet:upper())

local M = {}

ryanpcmcquen

#!/bin/sh
# Darkify Slack on Mac OS or Linux.

# curl https://gist.githubusercontent.com/ryanpcmcquen/8a7ddc72460eca0dc1f2dc389674dde1/raw/darkify_slack.sh | sh

if [ "`uname -s`" = "Darwin" ]; then
    SLACK_INTEROP_JS="/Applications/Slack.app/Contents/Resources/app.asar.unpacked/dist/ssb-interop.bundle.js"
else
    SLACK_INTEROP_JS="/usr/lib/slack/resources/app.asar.unpacked/dist/ssb-interop.bundle.js"
fi

audionerd

import React, { useState, useEffect, useMemo } from 'react'
import { Machine } from 'xstate'
import { interpret } from 'xstate/lib/interpreter'

const toggleMachine = Machine({
  id: 'toggle',
  initial: 'inactive',
  states: {
    inactive: {
      on: { TOGGLE: 'active' }

gaearon

Note:

When this guide is more complete, the plan is to move it into Prepack documentation.
For now I put it out as a gist to gather initial feedback.

A Gentle Introduction to Prepack (Part 1)

If you're building JavaScript apps, you might already be familiar with some tools that compile JavaScript code to equivalent JavaScript code:

• Babel lets you use newer JavaScript language features, and outputs equivalent code that targets older JavaScript engines.