alex-miller-0

Suppose we wish to model a UTXO system on the EVM. We need to represent UTXO tokens such that all value is preserved when tokens are spent. Note: For this example, we are not concerned about the security of the system and are satisfied with giving authorities the power to create tokens (e.g. as in a plasma system).

Consider the following object:

{
  owner: <address>,
  value: <uint>,

girvo

• Get started • • BigchainDB

  https://www.bigchaindb.com/getstarted/

• Kadena: Scalable Blockchain | Smarter Contracts

  http://kadena.io/

• kadena-io/pact: The Pact Smart Contract Language

adrianmcli

Talks about Programming, Design, and Human Understanding

Meta Talks

• Simple Made Easy by Rich Hickey [1:01:26]
• On the Spectrum of Abstraction by Cheng Lou [35:32]
• Taming the Meta Language by Cheng Lou [36:47]
• The Future of Programming by Bret Victor [32:55]
• Constraints Liberate, Liberties Constrain by Runar Bjarnason [51:39]

xavierlepretre

module.exports = {
    promisify: function (web3) {
        // Pipes values from a Web3 callback.
        var callbackToResolve = function (resolve, reject) {
            return function (error, value) {
                    if (error) {
                        reject(error);
                    } else {
                        resolve(value);
                    }

xavierlepretre

const Rx = require('rx');

module.exports = {
    rxify: function (web3) {
        // List synchronous functions masquerading as values.
        var syncGetters = {
            db: [],
            eth: [ "accounts", "blockNumber", "coinbase", "gasPrice", "hashrate",
                "mining", "protocolVersion", "syncing" ],
            net: [ "listening", "peerCount" ],

jimschubert

if (!String.prototype.repeat) {
  // polyfill from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
  String.prototype.repeat = function(count) {
    'use strict';
    if (this == null) {
      throw new TypeError('can\'t convert ' + this + ' to object');
    }
    var str = '' + this;
    count = +count;
    if (count != count) {

xavierlepretre

web3.eth.filter("pending").watch(function() {
    if (eth.mining) return;
    console.log(new Date() + "-- Transactions detected, so starting mining.");
    miner.start(1);
});

web3.eth.filter('latest', function(error, result) {
    console.log(new Date() + "-- Got latest, so stopping mining");
    miner.stop();
    if (txpool.status.pending > 0) {

yoavniran

The Ultimate Unit Testing Cheat-sheet

---

• Sinon Chai
• Chai
• Sinon

brigand

// where map(x, function(y, i, z){ z === x; return y }) === x
// and i is the index/key, and z is the first argument to map
// e.g. utilsFromMap(function(array, fn){ array.map(fn) });
// e.g. utilsFromMap(React.Children.map);
function utilsFromMap(map){
  var utils = {};
  
  // herein fn is a function, 
  // X is the thing to be passed to map as the first argument
  // and there other parameters are specific to the function