jwulf

function outerScope() {
    let a = "Hello"
    
    console.log(a) // "Hello"
    
    function innerScope() {
        a = 3
        return
    }

jwulf

var a = {
  loop: (() => setInterval(() => console.log('It lives!'), 1000))()
}

console.log(a)
a = undefined
console.log(a)

jwulf

//global variable
const GlobalMembersArray  =[];

/**
 * This creates a new Member.
 * @class
 * @classdesc A Member object.
 * @param {Object} memberData - The data for the member to create.
 * @param {string} memberData.id - The unique id of the member.
 * @param {string} memberData.password - The member's password.

jwulf

//global variable
const GlobalMembersArray  =[];

/**
 * Member type definition
 * @typedef {Object} Member
 * @property {string} id - The unique id of the member.
 * @property {string} password - The member's password.
 */

jwulf

//global variable
const GlobalMembersArray  =[];

/**
 * Create a new member.
 * @param {Object} memberData - The data for the member to create.
 * @param {string} memberData.id - The unique id of the member.
 * @param {string} memberData.password - The member's password.
 */
function Member({id, password}){

jwulf

//global variable
const GlobalMembersArray  =[];

// TypeScript types on function parameters
function Member({id, password}: {id: string, password: string}){
  this.id          = id; 
  this.password    = password
}
  
const member1 = new Member({id: "m001", password: "123"});

jwulf

//global variable
const GlobalMembersArray  =[];

//object    
function Member({id, password}){
  this.id          = id; 
  this.password    = password
}
  
const member1 = new Member({id: "m001", password: "123"});

jwulf

//global variable
const GlobalMembersArray = [];

//object    
function Member(id, password) {
  this.id          = id; 
  this.password    = password
}
  
const member1 = new Member("m001","123");

jwulf

const GlobalMemberStore = (() => {
  let _members = []
  const needsArg = arg => {
    if (!arg) {
      throw new Error (`Undefined passed as argument to Store!`)
    }
    return arg
  }
  const needsId = member => {
    if (!member.id) {

jwulf

const GlobalMemberStore = (() => {
  let _members = []
  const Store = {
    putMember: member => {
      // Validate required args
      const m = needsId(needsArg(member))
      if (Store.getMember(m.id).found) {
        throw new Error(`${m.id} already exists!`)
      }
      _members = [..._members, {...m}]