spenserhuang

let jsChain = new Blockchain();
jsChain.addBlock(new Block("12/25/2017", {amount: 5}));
jsChain.addBlock(new Block("12/26/2017", {amount: 10}));

console.log(JSON.stringify(jsChain, null, 4));
console.log("Is blockchain valid? " + jsChain.checkValid());

spenserhuang

const SHA256 = require('crypto-js/sha256')

class Block {
    constructor(timestamp, data) {
        this.index = 0;
        this.timestamp = timestamp;
        this.data = data;
        this.previousHash = "0";
        this.hash = this.calculateHash();
        this.nonce = 0;

spenserhuang

class Blockchain{
    constructor() {
        this.chain = [this.createGenesis()];
    }

    createGenesis() {
        return new Block(0, "01/01/2017", "Genesis block", "0")
    }

spenserhuang

const SHA256 = require('crypto-js/sha256')

class Block {
    constructor(timestamp, data) {
        this.index = 0;
        this.timestamp = timestamp;
        this.data = data;
        this.previousHash = "0";
        this.hash = this.calculateHash();
        this.nonce = 0;

spenserhuang

class Block {
    constructor(timestamp, data) {
        this.index = 0;
        this.timestamp = timestamp;
        this.data = data;
        this.previousHash = "0";
        this.hash = this.calculateHash();
        this.nonce = 0;
    }

spenserhuang

Elixir Resources

• Resource Lists
  • Awesome Elixir Resource List https://github.com/h4cc/awesome-elixir
  • Elixir Talks https://github.com/elixir-lang/elixir/wiki/Talks
  • Phoenix Framework http://www.phoenixframework.org/
  • Elixir Official Site http://elixir-lang.org/

spenserhuang

The following links were used as references for this talk: SF RoR Meetup: High Performance Learning

• Dan Pink on what motivates us in Drive (and the book)
• Angela Duckworth's work on the key to success: Grit
• Shawn Anchor on the Happy Secret to Better Work
• Richard Mayer on Applying the Science of Learning
• Charles Duhigg on The Power of Habit
• Andy Puddicombe on Mindfulness
• Carol Dweck on Mindset

spenserhuang

//------------------------------------------------------------------------------------------------------------------
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
//------------------------------------------------------------------------------------------------------------------

function Animal ( name, num_of_legs ) {
  this.name = name;
  this.num_of_legs = num_of_legs;
}

Animal.prototype.identify = function() {

spenserhuang

# Solution for Challenge: Database Drill: Intro to SQLite. Started 2015-05-09T04:09:18+00:00
sqlite>
sqlite> .schema
CREATE TABLE users (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  first_name VARCHAR(64) NOT NULL,
  last_name  VARCHAR(64) NOT NULL,
  email VARCHAR(128) UNIQUE NOT NULL,
  created_at DATETIME NOT NULL,
  updated_at DATETIME NOT NULL

spenserhuang

# There may be a few typos here and there and I also did not put up the Twilio Portion.

# ------------------------------------------------------------
# CSV
# ------------------------------------------------------------


require 'csv'

class Person