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const map = {
  "TCS" : "Tata Consultancy Services",
  "SUN" : "Stanford University Networks"
}

function getCompanyName(abbr){
 return map[abbr]
}

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const promise1 = Promise.resolve("This");
const promise2 = Promise.resolve("is");
const promise3 = Promise.resolve("my");
const promise4 = Promise.resolve("first");
const promise5 = Promise.resolve("day");
const promise6 = Promise.resolve("JavaScript");


Promise.all([promise1, promise2, promise3,promise4,promise5,promise6]).then(function(values) {
  console.log(values.join(" "));

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Official Website

http://www.mongodb.com

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Mongodb is a OODBMS, ie a object oriented database management system, where in data is stored in terms of objects instead of conventional rows. Mongodb is also being called as a No-SQL database because we do not use any SQL syntax Official Documentation is available at

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What is Express JS? As per the official website, http://expressjs.com/

ExpressJs is basically a light-weight web framework, allowing to build server side web applications, it has full capabilities to develop applications that can behave as a server side application or just use to make REST-API.

To begin with we start with

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var-let-const IIFE in Javascript Functions in Javascript Arrow functions in Javascript Making private functions in Javascript What is this in Javascript What is an object Node.JS Blogs Articles

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A function in simple terms takes an input, does something and gives a output. In simple terms there is always some sort of action inside a function.

A function may or may not take arguements.

1. If it takes one argument it's a monoadic function
2. If it takes then it is called a two diadic function
3. More than 2 then it is a polyadic function.

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Please feel free to mention any topics you would like me to make a write-up on or if you want to see a running a code example on any topic in Javascript, I will try my best to explain.

Please subscribe to MPJ on youtube his channel is funfunfunction https://www.youtube.com/channel/UCO1cgjhGzsSYb1rsB4bFe4Q

Below are some topics for which I will be making new set of notes.

1. var-let-const https://gist.github.com/siddrc/3f9d345dcdcb82b1eb86a16da1a8aecb
2. JSON https://gist.github.com/siddrc/047fd7220684d8251c9b8751d70d91a3

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Introduction

JSON, stands for Javascript Object Notation. The way we define JSON is as follows

const jsonObject = {
     "key1" : function value1() {},
     "key2" : "value2",
 "key3" : true,

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Introduction

In learning ES6 the first we learn is to declaring variables.

ES6 dictates the use of let and const in declaring variables. Out of all the developer videos and articles 3 simple rules emerge in using var-let-const

1. var is totally discouraged in ES6 specification.