in node get method wiith params node js tutorials

 now we are working wiht static data only

to learn react or node js 

we have to expertise with es6 or arrow functions

app.get("/persons/:id",(req,res,next) =>

{

let idd=req.params.id;

let person=[

{name:"hudere",addr:"vamsi1",id:1},

{name:"hudere",addr:"vamsi2",id:2},

{name:"hudere",addr:"vamsi3",id:3}

];

person=person.filter(x=>x.id==idd);

res.send(person);

}

)

we given code in above

what is this is 

whenever we request persons with id like below

http://localhost:3000/persons/1

it will takt that id by request id is params so req.params then id require

it filter id matches with list id

if mathes it shows otherwise not shows

 

it will show the empty array if not matched with json id which has in code