apieceofbart

PLEASE CHECK THIS REPO WITH THE EXAMPLES THAT YOU CAN RUN:
https://github.com/apieceofbart/async-testing-with-jest-fake-timers-and-promises

// Let's say you have a function that does some async operation inside setTimeout (think of polling for data)

function runInterval(callback, interval = 1000) {
  setInterval(async () => {
    const results = await Promise.resolve(42) // this might fetch some data from server
    callback(results)
  }, interval)

csandman

What other .env files can be used?

Note: this feature is available with react-scripts@1.0.0 and higher.

• .env: Default.
• .env.local: Local overrides. This file is loaded for all environments except test.
• .env.development, .env.test, .env.production: Environment-specific settings.
• .env.development.local, .env.test.local, .env.production.local: Local overrides of environment-specific settings.

Files on the left have more priority than files on the right:

palicko

html {
  display: flex;
}

body {
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
}

jherax

/**
 * Filters an array of objects using custom predicates.
 *
 * @param  {Array}  array: the array to filter
 * @param  {Object} filters: an object with the filter criteria
 * @return {Array}
 */
function filterArray(array, filters) {
  const filterKeys = Object.keys(filters);
  return array.filter(item => {

muammar

#!/bin/bash

## cf from http://programster.blogspot.com/2014/05/ubuntu-14-desktop-install-fira-sans-and.html

cd /tmp

# install unzip just in case the user doesn't already have it.
if [[ `uname` = Linux ]]; then
    sudo apt-get install unzip -y
    wget "http://www.carrois.com/downloads/fira_4_1/FiraFonts4106.zip"

learncodeacademy

//events - a super-basic Javascript (publish subscribe) pattern

var events = {
  events: {},
  on: function (eventName, fn) {
    this.events[eventName] = this.events[eventName] || [];
    this.events[eventName].push(fn);
  },
  off: function(eventName, fn) {
    if (this.events[eventName]) {

mbinna

#!/usr/bin/env bash

rm -rf "${HOME}/Library/Caches/CocoaPods"
rm -rf "`pwd`/Pods/"
pod update