how to get array of objects based on conditions from array using javascript

Question

I would like to know how to compare array of objects and array based on conditions using javascript

for the given array of object list and array arr1 , based on conditions

• if list country matches with arr1 , return array object
• if list country not matches with arr , return array object

var result =  list.filter(mem => arr1.includes(mem));

var list =[
  {country:"IN", name: "john"},
  {country:"SG", name: "peter"}
  {country:"MY", name: "zen"}
]

var arr1=["IN", "YU"]

Expected Output

matched list
[
  {country:"IN", name: "john"},
  {country:"SG", name: "peter"}
]
not matched list
[
  {country:"MY", name: "zen"}
]

Answer 1

You'll have to use to use filter method two times:

const list =[
  {country:"IN", name: "john"},
  {country:"SG", name: "peter"},
  {country:"MY", name: "zen"}
];
const arr1 = ["IN", "YU"];
const matched = list.filter((element) => arr1.includes(element.country));
const notMatched = list.filter((element) => !arr1.includes(element.country));

console.log('Matched List', matched);
console.log('Not Matched List', notMatched);

In the provided example, I'm assuming arr1 contains the country property that needs to be present in the country attribute of matched elements, else all others are not matched.