emmanuelnk

from sqlalchemy import event
import os
import logging
import sqlalchemy
import boto3
import base64
import json
from botocore.exceptions import ClientError

logger = logging.getLogger()

miguelmota

• BIP32 - is a method for generating a tree of private keys from a master private key.
• BIP39 - is a method for encoding 128-256 bits of random data into 12-24 word phrases from a list of interchangeable 2018 words, and then turn those phrases into a 64-byte hash.
• BIP44 - is a method for structuring a private key tree in a specific way that will facilitate usage/restoration/discovery of multiple accounts for multiple purposes.

zcaceres

Handling Errors

Express.js makes it a breeze to handle errors in your routes.

Express lets you centralizes your error-handling through middleware.

Let's look at patterns for how to get the most out of your error-handling.

First, our error-handling middleware looks like this:

cpsubrian

/* eslint-env jest */
import _ from 'lodash'
import path from 'path'
import fs from 'fs'
import callsites from 'callsites'
import knex from 'knex'
import hash from 'object-hash'
import conf from '<conf>'

// Get the db config.

tomconte

const fs = require('fs');
const solc = require('solc');
const Web3 = require('web3');

// Connect to local Ethereum node
const web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));

// Compile the source code
const input = fs.readFileSync('Token.sol');
const output = solc.compile(input.toString(), 1);

eloypnd

wildcard DNS in localhost development

• install dnsmasq

$ brew install dnsmasq
   ...
$ cp /usr/local/opt/dnsmasq/dnsmasq.conf.example /usr/local/etc/dnsmasq.conf

• edit /usr/local/etc/dnsmasq.conf

address=/local/127.0.0.1

andrewmclagan

import React, { Component, PropTypes } from 'react';
import { reduxForm, Field } from 'redux-form';

export class CreateUser extends Component {

  static propTypes = {
    createUser: PropTypes.func.isRequired,
    initialValues: PropTypes.object,
    submitting: PropTypes.bool.isRequired,
    invalid: PropTypes.bool.isRequired,

tracker1

Directory structure for JavaScript/Node Projects

While the following structure is not an absolute requirement or enforced by the tools, it is a recommendation based on what the JavaScript and in particular Node community at large have been following by convention.

Beyond a suggested structure, no tooling recommendations, or sub-module structure is outlined here.

Directories

• lib/ is intended for code that can run as-is
• src/ is intended for code that needs to be manipulated before it can be used

paulallies

#add 'node_modules' to .gitignore file

git rm -r --cached node_modules
git commit -m 'Remove the now ignored directory node_modules'
git push origin <branch-name>

branneman

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Possible solutions