es6.md

ES6 Features

• What is arrow function?
  • A shorter syntax then typical functions
  • Arrow functions should NOT be used:
  • When we want function hoisting
  • When we want to use this/arguments in a function
  • When we want to use named function
  • When we want to use function as a constructor
  • When we want to add function as a property in object literal and use object in it
• Constants

   const PI = 3.14;
  

• Currying

   const f = a => b => a + b;
   (2)(3) // output 5
  

• Default Parameters

    function sum(x=10, y=10) {
        return x+y;
    }
    console.log(sum()); // 20
    console.log(sum(5)); // 15
  

• Template Literals

    let str = "World.!";
    let tempStr = `Hello ${str}`;
    console.log(tempStr); // Hello World.!
  

• Arrow Functions

   let sum=(a,b)=>a+b;
   console.log(sum(2,2)); // 4
  

• Destructuring Assignment

  let arr=[1,2,3];
  let [a,b]=arr;
  console.log(a,b); //1,2
  

• Modules

    // sum.js
    export function sum(x, y) {
        return x + y;
    }
   //module.js
    import m from "../sum";
    m.sum(2,3);