nnhjs

Code: Intrucstion
Expressions are questions that Javascript can answer. Javascript answers expressions in the only way it knows how - with values.
Variables are Wires, Varaibles are not Values
Values:
  Types of Values:
    Primitive Values: Immutable values
      1. Undefined
        One value is undefined
      2. Null
        One value is null

nnhjs

Hoisting
Var let const
  hoisting
  declare
  block scope
Function contex & bind
  //global context
  //function context
  //bind
Arrow function expression (fat arrow)

nnhjs

Hướng dẫn viết một API cơ bản cho người tham gia phát triển cùng  
Sample : 
server 
  -
path   
    get
      

nnhjs

CLOUD.MONGODB
  sharding - lưu dữ liệu 
whitelist IP
Create database user for your cluster
Conect to Cluster
Insert and view Data your Cluster

nnhjs

Create Database - use DATABASE_NAME
Show all databse - show dbs
show current database - db
drop databse - db.dropDatabase()
Create collection: db.createCollection(name, options)
Drop collection: db.COLLECTION_NAME.drop()

Data type: String, Boolean, Araay, Integer, Double, Object, Null, Symbol, Timecstamp, Date, Object ID, Binary Data, Code, Regular expression

* Insert Document: you can use method insert() or save()