phillipalexander

L2 protocols

Trust protocols (not always auditable)

• Full custody (Coinbase)
• 2-of-3 arbitration / DLC
• Threshold multisig (ecash, Liquid)
• Off-chain peg-out tx (statechains)
• Collateralized custody

Payment channels

phillipalexander

/**
 * Annoying.js - How to be an asshole to your users
 *
 * DO NOT EVER, EVER USE THIS.
 *
 * Copyright (c) 2011 Kilian Valkhof (kilianvalkhof.com)
 * Visit https://gist.github.com/767982 for more information and changelogs.
 * Visit http://kilianvalkhof.com/2011/javascript/annoying-js-how-to-be-an-asshole/ for the introduction and weblog
 * Check out https://gist.github.com/942745 if you want to annoy developer instead of visitors
 *

phillipalexander

System Design Cheatsheet

Step One: Framing The Problem

• Identify the use cases that are in scope
• Determine constraints based on scoped use cases

use case : the things your system needs to be do.

constraints : the things your system will have to consider to be able to do stuff

phillipalexander

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

phillipalexander

Gist Clients

Want to create a Gist from your editor, the command line, or the Services menu? Here's how.

Editor Support

• TextMate
• Emacs
• Vim
• Coda

phillipalexander

#depends on underscore

_.isConstructor = (thing) ->
  if thing.name && thing.name[0].toUpperCase() == thing.name[0]
    true
  else
    false

class Instrumentor
  constructor: (namespace) ->

phillipalexander

echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://npmjs.org/install.sh | sh

phillipalexander

/*
	Grep.js
	Author	: Nic da Costa ( @nic_daCosta )
        Created : 2012/11/14
	Version	: 0.2
	(c) Nic da Costa
	License : MIT, GPL licenses

	Overview:
	Basic function that searches / filters any object or function and returns matched properties.

phillipalexander

# These are my notes from the PragProg book on CoffeeScript of things that either 
# aren't in the main CS language reference or I didn't pick them up there. I wrote 
# them down before I forgot, and put it here for others but mainly as a reference for 
# myself.

# assign arguments in constructor to properties of the same name:
class Thingie
    constructor: (@name, @url) ->

# is the same as:

phillipalexander

{
 "name": "flare",
 "children": [
  {
   "name": "analytics",
   "children": [
    {
     "name": "cluster",
     "children": [
      {"name": "AgglomerativeCluster", "size": 3938},