array.includes:

var arr = [1,2,3,4,5]
arr.indexOf(3) >=0 //true
equals
arr.includes(3) //true

Object.values:
var obj = {a:1,b:"2",c:3.0}
console.log(Object.values(obj));//[1,"2",3.0]

using Object.entries for reflection:
var obj = {a:1,b:"2",c:3.0}

using Object.keys :
Object.keys(obj).forEach(k=>{console.log(`k:${k} v:${obj[k]}`)})
using Object.entries:
for(let [k,v] of Object.entries(obj)){console.log(`k: ${k} v:${v}`);}

populate values into map:
1. Object.keys
var m = new Map();
Object.keys(obj).forEach(k=>{m.set(k, obj[k]);});
console.log(m); //{a=>1,b=>"2",c=>3}

2. Object.entries
var m2 = new Map(Object.entries(obj));
console.log(m2)// {a=>1, b=>"2", c=>3}