MichaelSimons

Retrieving Docker Image Sizes

There are two metrics that are important to consider when discussing the size of Docker images.

1. Compressed size - This is often referred to as the wire size. This affects how fast/slow images can be pulled from a registry. This impacts the first run experience on machines where images are not cached.
2. Uncompressed size - This is often referred to as the size on disk. This affects how much local storage is required to support your Docker workloads.

The example commands shown below will work on Windows, MacOS, and Linux.

How to Measure the Compressed Size

tannerlinsley

type State = {
  added: boolean;
  interval: false | ReturnType<typeof setInterval>;
  inFrame: boolean;
  callbacks: Array<SetFocusedCallback>;
};

type EnrichedHTMLIFrameElement = HTMLIFrameElement & { ___onWindowFocusHandled: boolean };

type SetFocusedCallback = (focused?: boolean) => void;

drcmda

const easeInOutCubic = t => (t < 0.5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1)

function timeline(t, number, slot, cb) {
  const range = slot * (1 / number)
  if (t >= range && t <= range + 1 / number) cb(easeInOutCubic((t - range) * number))
}

function useTimeline(factor = 1, number, offset, callback) {
  useFrame(state => {
    const t = (Math.sin(state.clock.getElapsedTime() * factor) + 1) / 2

heyitsarpit

node_modules

benhatsor

// Both numbers and letters
function mixedID() {
  var now = new Date();
  
  timestamp = now.getFullYear().toString();
  timestamp += (now.getMonth < 9 ? '0' : '') + now.getMonth().toString();
  timestamp += ((now.getDate < 10) ? '0' : '') + now.getDate().toString();
  timestamp += now.getHours().toString();
  timestamp += now.getMinutes().toString();
  timestamp += now.getSeconds().toString();

kidGodzilla

My notes for Dokku on Digital Ocean.

These may be a bit outdated: Since I originally wrote them, I've reinstalled on a newer Dokku and may not have updated every section below.

Commands

Install dokku-cli (gem install dokku-cli) for a more Heroku-like CLI experience (dokku config:set FOO=bar).

# List/run commands when not on Dokku server (assuming a "henroku" ~/.ssh/config alias)

ssh henroku dokku

SuwakoMmh

Using the same SSH key for multiple Github (& co) accounts

The most known hack is to edit ~/.ssh/config and use a different hostname in place of github.com for each account. (ref this gist)

However, one might still want to use github.com as a hostname for various reasons. Hence this hack idea I had.

1. Creating a bridge user

This may vary depending on the distribution, but for ubuntu or any given useradd :

# useradd -r -m -d /opt/git git

jfet97

function isObject(entity) {
    return typeof entity === "object" && entity !== null;
}

function getAdjacentNodes(obj) {
    return (
        Object.entries(obj)
        .filter(([, v]) => isObject(v))
    )
}

kidGodzilla

const requestIp = require('request-ip');

function getIp (req) {
    let ip = null;

    try {
        //ip = (req.headers['x-forwarded-for'] || '').split(',').pop() ||
        //    req.connection.remoteAddress ||
        //    req.socket.remoteAddress ||
        //    req.connection.socket.remoteAddress;

kidGodzilla

/***
* Given a slightly messy set of input strings, attempt to match a well-known browser name, and return an icon
*
* Examples: 
* inferBrowserIcon('safari') // exact match
* inferBrowserIcon('Safari Mobile 15.4') // matches "safari" from input string
* inferBrowserIcon('Firefox 99', 128) // pick a specific size (from sizes)
* inferBrowserIcon('unknownbrowser') // fallback if no match
* inferBrowserIcon(null, 128, 'brave') // You know the browser-logos repo key
*/