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@vasanthk
vasanthk / System Design.md
Last active November 25, 2024 18:04
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@milankragujevic
milankragujevic / youtube-extract-ids-from-playlist.js
Created July 28, 2017 00:30
To extract all the video IDs from a YouTube playlist. Open the playlist page, scroll down to the bottom, click load more, repeat until the end, then open Console and paste this code. Output is a list of video IDs from the page.
var els = document.getElementsByClassName('pl-video');
for(i = 0; i < els.length; i++) {
var el = els[i];
if(el) {
var src = el.getElementsByClassName('yt-thumb-clip')[0].getElementsByTagName('img')[0].src;
if(!src.match(/\.com\/vi\//g)) { continue; }
var id = src.split('.com/vi/')[1].split('/')[0];
console.log(id);
}