dguo

class DatabaseError extends Error {}

const error = new DatabaseError("Unique constraint violation");

// prints "true"
console.log(error instanceof Error);
// incorrectly prints "false"
console.log(error instanceof DatabaseError);

dguo

hyperfine 'lua slow.lua'
# Benchmark #1: lua slow.lua
#   Time (mean ± σ):      1.287 s ±  0.115 s    [User: 1.120 s, System: 0.078 s]
#   Range (min … max):    1.187 s …  1.528 s    10 runs
hyperfine 'lua fast.lua'
# Benchmark #1: lua fast.lua
#   Time (mean ± σ):      39.3 ms ±   3.8 ms    [User: 34.6 ms, System: 2.8 ms]
#   Range (min … max):    35.3 ms …  58.3 ms    48 runs

dguo

const got = require("got");

async function getAwwPost() {
    const response = await got(
        "https://www.reddit.com/r/aww/top.json?t=day"
    ).json();

    for (const post of response.data.children) {
        if (post.data.post_hint !== "image") {
            continue;

dguo

const twilio = require("twilio")(
    process.env.TWILIO_ACCOUNT_SID,
    process.env.TWILIO_AUTH_TOKEN
);

async function sendText(body, mediaUrl) {
    const text = await twilio.messages.create({
        body,
        mediaUrl: mediaUrl ? [mediaUrl] : [],
        from: process.env.TWILIO_PHONE_NUMBER,

dguo

# Run from a PowerShell prompt with administrative privileges:
# Install-BoxstarterPackage -PackageName <url> -DisableReboots

choco install anki
choco install autohotkey
choco install firefox-dev --pre
choco install googlechrome
choco install logitechgaming
choco install steam
choco install todoist

dguo

{{ if (findRE "<pre" .Content 1) }}
    <script src="/js/copy-code-button.js"></script>
{{ end }}

dguo

if (navigator && navigator.clipboard) {
    addCopyButtons(navigator.clipboard);
} else {
    var script = document.createElement('script');
    script.src = 'https://cdnjs.cloudflare.com/ajax/libs/clipboard-polyfill/2.7.0/clipboard-polyfill.promise.js';
    script.integrity = 'sha256-waClS2re9NUbXRsryKoof+F9qc1gjjIhc2eT7ZbIv94=';
    script.crossOrigin = 'anonymous';
    script.onload = function() {
        addCopyButtons(clipboard);
    };

dguo

function addCopyButtons(clipboard) {
    document.querySelectorAll('pre > code').forEach(function (codeBlock) {
        var button = document.createElement('button');
        button.className = 'copy-code-button';
        button.type = 'button';
        button.innerText = 'Copy';

        button.addEventListener('click', function () {
            clipboard.writeText(codeBlock.innerText).then(function () {
                /* Chrome doesn't seem to blur automatically,

dguo

.copy-code-button {
    color: #272822;
    background-color: #FFF;
    border-color: #272822;
    border: 2px solid;
    border-radius: 3px 3px 0px 0px;

    /* right-align */
    display: block;
    margin-left: auto;

dguo

document.querySelectorAll('pre > code').forEach(function (codeBlock) {
    var button = document.createElement('button');
    button.className = 'copy-code-button';
    button.type = 'button';
    button.innerText = 'Copy';

    var pre = codeBlock.parentNode;
    if (pre.parentNode.classList.contains('highlight')) {
        var highlight = pre.parentNode;
        highlight.parentNode.insertBefore(button, highlight);