maecapozzi

function *getUser(username) {
  const uri = 'https://api.github.com/users/' + username
  const response = yield fetch(uri)
  const parsedResponse = yield response.json()
  console.log(parsedResponse)
}

getUser('maecapozzi')

maecapozzi

const makeHTTPRequest = (username) => {
  const url = 'https://api.github.com/users/' + username
  fetch(url)
    .then(response => response.json())
    .then(response => console.log(response))
}

makeHTTPRequest('maecapozzi')

maecapozzi

const makeHTTPRequest = (url, methodType, callback) => {
  const xhr = new XMLHttpRequest()
  xhr.open(methodType, url, true)
  xhr.onreadystatechange = () => {
    if (xhr.readyState === 4 && xhr.status === 200) {
      callback(xhr.responseText)
    }
  }
  xhr.send()
}

maecapozzi

const greetUser = () => { 
  new Promise((resolve, reject) => { 
    let name = prompt('Please enter your name')
    resolve(name)
  }).then((name) => {
  	console.log('Hello ' + name)
  })
}

maecapozzi

const greeting = (name) => { 
  console.log('Hello ' + name)
}

const processUserInput = (callback) => { 
  let name = prompt('please enter your name')
  callback(name)
}

processUserInput(greeting)

maecapozzi

class Stack { 
  constructor () { 

    this.state = { 
      storage: '', 
      count: 0, 
      mostRecent: ''
    }
  };

maecapozzi

Hoisting

Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope before code execution.

JavaScript always initializes, and then declares variables.

function hoist() {
  a = 20;
  var b = 100;
}

maecapozzi

import React from 'react'
import axios from 'axios'
import UserProfile from './UserProfile'

class UserProfileContainer extends React.Component {
  state = {}

  componentDidMount() {
    axios.get('http://localhost:3001/users', {
      params: {