console-1690520285635.log

var arr = [{id:1001, name:'Ram', salary:9999}, {id:1002, name:'Shyam',salary:4444}, {id:1003,name:'Tim' , salary:5555}];
undefined
var g = arr.filter(e=>true);
undefined
g == arr;
false
g[0].id=11111;
11111
g;
(3) [{…}, {…}, {…}]0: {id: 11111, name: 'Ram', salary: 9999}1: {id: 1002, name: 'Shyam', salary: 4444}2: {id: 1003, name: 'Tim', salary: 5555}length: 3[[Prototype]]: Array(0)
arr;
(3) [{…}, {…}, {…}]0: {id: 11111, name: 'Ram', salary: 9999}1: {id: 1002, name: 'Shyam', salary: 4444}2: {id: 1003, name: 'Tim', salary: 5555}length: 3[[Prototype]]: Array(0)
var e = arr.map(e=>e.salary + e.salary * 0.10);
undefined
e;
(3) [10998.9, 4888.4, 6110.5]
var prices  = [100,200,300,400];
undefined
prices.map(p=>`Rs ${price}`);
VM549:1 Uncaught ReferenceError: price is not defined
    at <anonymous>:1:21
    at Array.map (<anonymous>)
    at <anonymous>:1:8
(anonymous) @ VM549:1
(anonymous) @ VM549:1
prices.map(p=>`Rs ${p}`);
(4) ['Rs 100', 'Rs 200', 'Rs 300', 'Rs 400']
prices;
(4) [100, 200, 300, 400]
prices.reduce((total, p)=>total+p,0);
1000
prices.reduce((total, p)=>total+p,0);
1000
arr;
(3) [{…}, {…}, {…}]0: {id: 11111, name: 'Ram', salary: 9999}1: {id: 1002, name: 'Shyam', salary: 4444}2: {id: 1003, name: 'Tim', salary: 5555}length: 3[[Prototype]]: Array(0)
arr.reduce((subArray, currentObject)=>{
    if(currentObject.salary>5000){
        subArray.push(currentObject);
    }
    return subArray;
},[]);
(2) [{…}, {…}]0: {id: 11111, name: 'Ram', salary: 9999}1: {id: 1003, name: 'Tim', salary: 5555}length: 2[[Prototype]]: Array(0)