LewisJEllis

// from https://twitter.com/Steve8708/status/1504131981444980739
// simplified to a function body of 8 tidy lines
// no loop needed, no 2d array of 3-tuples needed
// just 2 arrays, a findIndex call, and some indexing :)

export function getRelativeTimeString(
  date: Date | number,
  lang = "en"
): string {
  const timeMs = typeof date === "number" ? date : date.getTime();

acdlite

// getComponent is a function that returns a promise for a component
// It will not be called until the first mount
function asyncComponent(getComponent) {
  return class AsyncComponent extends React.Component {
    static Component = null;
    state = { Component: AsyncComponent.Component };

    componentWillMount() {
      if (!this.state.Component) {
        getComponent().then(Component => {

Rich-Harris

Edit — February 2019

This gist had a far larger impact than I imagined it would, and apparently people are still finding it, so a quick update:

• TC39 is currently moving forward with a slightly different version of TLA, referred to as 'variant B', in which a module with TLA doesn't block sibling execution. This vastly reduces the danger of parallelizable work happening in serial and thereby delaying startup, which was the concern that motivated me to write this gist
• In the wild, we're seeing (async main(){...}()) as a substitute for TLA. This completely eliminates the blocking problem (yay!) but it's less powerful, and harder to statically analyse (boo). In other words the lack of TLA is causing real problems
• Therefore, a version of TLA that solves the original issue is a valuable addition to the language, and I'm in full support of the current proposal, which you can read here.

I'll leave the rest of this document unedited, for archaeological

gaearon

function mapValues(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    result[key] = fn(obj[key], key);
    return result;
  }, {});
}

function pick(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    if (fn(obj[key])) {

Rarst

How to get Composer running on SiteGround shared

1. Download getcomposer.org/composer.phar to your account's home directory — /home/username.
2. Edit .bashrc file in same directory by adding alias composer='/usr/local/php56/bin/php-cli ~/composer.phar' line. Update php56 part to current relevant version, if necessary.
3. Restart SSH session or run source ~/.bashrc to reload config.
4. Use composer command!

elithrar

[unix_http_server]
file=/var/run/supervisor.sock
chmod=0770
chown=root:supervisor

[supervisord]
pidfile=/var/run/supervisord.pid
nodaemon=false
logfile=/var/log/supervisord/supervisord.log
loglevel=error

hanksudo

前端工程師面試問題集

@版本 2.0.0

譯注：此翻譯版，主要給不能流利的讀英文的人看，相關專有名詞還是保留原文。翻譯不好地方請協助pull request.

此repository包含了一些前端開發的面試問題，來審查一個有潛力的面試者。這並不是建議你對同一個面試者問上所有的問 (那會花費好幾小時)。從列表中挑幾個題目，應該就夠幫助你審查面試者是否擁有你需要的技能。

Rebecca Murphey 的 Baseline For Front-End Developers 也是一篇很棒且值得讀的文章在你開始面試之前。