simonschwartz

// given a database of global parcels like this...
const allGlobalParcels = [
  {
    created: 576424800000,
    location: "aus",
    properties: { ... },
  },
  {
    created: 1558163267311,
    location: "us",

simonschwartz

// given a database of global parcels like this...
const allGlobalParcels = [
  {
    created: 576424800000,
    location: "aus",
    properties: { ... },
  },
  {
    created: 1558163267311,
    location: "us",

simonschwartz

const createURL = baseURL => {
  const protocol = "https";

  // we now return a function, that accepts a 'path' as an argument
  return path => {
    return `${protocol}://${baseURL}/${path}`;
  };
};

// we create a new functions with the baseURL value in it's closure scope

simonschwartz

const createURL = (baseURL, path) => {
  const protocol = "https";
  return `${protocol}://${baseURL}/${path}`;
};

// create URLs for our main site
const homeURL = createURL("mysite.com", "");
const loginURL = createURL("mysite.com", "login");
const productsURL = createURL("mysite.com", "products");
const contactURL = createURL("mysite.com", "contact-us");

simonschwartz

import { createRequest } from 'request-state-wrapper';

const getNodeRepoDetails = () => 
  fetch('https://api.github.com/repos/nodejs/node').then(response => response.json());

const getGoRepoDetails = () => 
  fetch('https://api.github.com/repos/golang/go').then(response => response.json());

const request = createRequest({
  request: [getNodeRepoDetails, getGoRepoDetails],

simonschwartz

const getNodeRepoDetails = () => 
  fetch('https://api.github.com/repos/nodejs/node').then(response => response.json());

const getGoRepoDetails = () => 
  fetch('https://api.github.com/repos/golang/go').then(response => response.json());

Promise.all([getNodeRepoDetails(), getGoRepoDetails()])
  .then(response => {
      const [ nodeResponse, goResponse ] = response;
      /* handle request response */ 

simonschwartz

import { createRequest } from 'request-state-wrapper';

const getRepoDetails = () => 
  fetch('https://api.github.com/repos/nodejs/node').then(response => response.json());

// Create your request with request-state-wrapper
const request = createRequest({
  request: getRepoDetails,
  stalledDelay: 1000,
  onStalled: () => { /* handle stalled state */ },

simonschwartz

// Compare two arrays(primary and secondary) and return all array items that are unique to the primary array
const getDiff = (primaryArray, secondaryArray) => {
  return primaryArray.filter(item => secondaryArray.indexOf(item) === -1);
};

// getDiff([1, 2, 3, 5], [1, 3, 4])
// => [2, 5]