Chryus

> var first_name = function (name) {
...   return name;
... }
undefined
> first_name("bob");
'bob'

//first_name is a variable with an anonymous function as its value. we assign

> function add(x,y) {

Chryus

var yeti = {
    find: function fn() {
        return this.appetite;
    },
    appetite: "gigantic"
};

var polar_bear = Object.create(yeti);
polar_bear.appetite = "huge";
    

Chryus

var yeti = {
    find: function fn() {
        return this.appetite;
    },
    appetite: "gigantic"
};
 

Chryus

var polar_bear = Object.create(yeti);
polar_bear.appetite = "huge";
    
var seal = Object.create(polar_bear);
seal.appetite = "big";
 
var arctic_hare = Object.create(seal);
 
var snow_mouse = Object.create(arctic_hare);
 

Chryus

var yao = {
  self: function () { return this }
}
console.log(yao === yao.self());

//yao.self is equal to yao, so this return a boolean value of true.

> var lebron = {
...   occupation: "basketball",
...   introduction: function () {

Chryus

//the plus character is greedy. It matches the preceding character as many times as possible.

str = "maroooooooooned on a desert island"
reg = /(o+)/
res = str.match(reg); //=> 'ooooooooo'

//we can make the plus operator lazy by adding a question mark after it.
//note that the only thing changed is the insertion of the special character "?", which tells the RegEx plus operator to calm down and not be such a glutton for o's.

str = "maroooooooooned on a desert island"

Chryus

> var reg = /([a-zA-Z\s]+) ([A-Z]{2})/

> var string = "New York NY 10006 United States"

> var res = string.replace(reg, '$1,');

> console.log(res);

New York, 10006 United States

Chryus

> var reg = /([a-zA-Z\s]+) ([A-Z]{2})/

> var string = "New York NY 10006 United States"

> var res = string.match(reg);

> console.log(res);

[ 'New York NY',
  'New York',

Chryus

> var reg = /([a-zA-Z\s]+) ([A-Z]{2})/g

> var string = "New York NY 10006 United States"

> var res = string.match(reg);

> console.log(res);

[ 'New York NY' ]

Chryus

function validate(password) {
  return /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-z]{6,}$/.test(password);
}

//If password contains at least one digit, one uppercase char, one lowercase char PLUS six or more 
//chars from the character class composed of one digit, one uppercase char, and one lowercase char.
> validate('djI38D55');
true

//passes if 6 or more chars