Arrow functions in Java Script

Arrow functions

Arrow functions  are a more concise syntax for writing function expressions. They utilize a new token, =>, that looks like a fat arrow.
Arrow functions make our code more concise, and simplify function scoping and the this keyword. They are one-line mini functions which work much like Lambdas in other languages like C# or Python.

Simple Example:

//simple function 

const sayHello = function(name) {

     return "hey" +name+ "!"

 }

 console.log(sayHello('Pritpal'));

Arrow function with filter():

//Arrow function

const sayHello = (name)=> `hey${ name} !`    

    console.log(sayHello('Pritpal'));

const todos=[{

    title:'Buy bread',

    isDone:true,

},{

    title:'Go to Gym',

    isDone:true,

},{

    title:'learn java Script',

    isDone:false,

}]

//filter() get the only value which are true or correct 

const thingDone = todos.filter((todo) => todo.isDone === true)

console.log(thingDone);