Filtering an array for matches?

Question

JavaScript

let arr1 = [ ["british", "classic-rock"], ["pop"], ["rock", "classic-rock"] ]

let arr2 = ["british", "pop"]

How to filter arr1 for arr2 matches?

The output should be -[ ["british", "classic-rock"], ["pop"] ]

Answer 1

const groups = [
    ["british", "classic-rock"],
    ["pop"],
    ["rock", "classic-rock"],
  ];
  const filterKeys = ["british", "pop"];
  
  groups.filter((g) => filterKeys.some((k) => g.includes(k)))

Answer 2

Understood nothing. Why did you take classic-rock into the final array in the first example , and decided to discard it in the second?
Most likely, the .filter() method will suit you . You simply check through this method each element of the array for the presence in the selected ones.