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Async VS Promise

the following is the code used for this lighting talk https://slides.com/allthedey/async-vs-promise

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// @flow
import { createMessage as createMessageBase, requestMessage, addToCollection } from '../../../store/modules/message';
import { tryCatchAxiosAction } from '../../../services/api-client';

/* ::
 type Message = {
   message_id: string
 }
*/

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start frontend manually

pre-req

• node 8 -> it's cool to install w/ nvm

then nvm install v8 --lts

• yarn: https://yarnpkg.com/en/docs/install

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Install dev env using minikube

Pre-requisites

• kubernetes & minikube
• git-crypt (eventually via your distribution package manager)

WARNING

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import React, { Component } from 'react'
import PropTypes from 'prop-types'
// ...

class Foo extends Component {
  createHandleSearchChange = (tags) => terms =>
    this.setState({ foundTags: whateverFindAlgo(tags, terms)})

  handleAddTag = (updateEntityTags, entity, tag) => {
    updateEntityTags(entity, [...entity.tags, tag])

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import { createSelector } from 'reselect';
import { connect } from 'react-redux';
import { currentTabSelector } from '../store/selectors/tab';

const mapStateToProps = createSelector(
  [currentTabSelector],
  currentTab => ({
    currentTab,
  })
);

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favoriteAddressFilter = (addresses, searchTerms) => addresses.reduce((acc, address) => {
    if (!acc) {
      return address;
    }

    if (address.startsWith(searchTerms) && !acc.startsWith(searchTerms)) {
      return address;
    }

    if (!acc.is_primary && address.is_primary === true) {

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#!/bin/bash

set +e
set -v

docker-compose stop
docker-compose rm
docker volume rm devtools_db devtools_index devtools_store
docker-compose up -d redis cassandra elasticsearch
sleep 20

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// unit test of redux middleware w/ jest

import configureStore from './configure-store';

const middleware = store => next => (action) => {
  if (action.type === 'FOO') {
    Promise.resolve({ type: 'FOO_SUCCESS', payload: {} }).then(act => store.dispatch(act);
  }

  return next(action);

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package http_middleware

import (
	"encoding/base64"
	"encoding/json"
	"gopkg.in/gin-gonic/gin.v1"
	"gopkg.in/redis.v5"
	"net/http"
	"strconv"
	"strings"