Test case details

Preparation Code

const arr = []; const arrr = [1, 2, 3, 4]; const obj = {}; const objj = { x: 1, y: 2, z: 'a'};

Test cases

Test #1

Array.isArray(arr); Array.isArray(arrr); Array.isArray(obj); Array.isArray(objj);

Test #2

arr instanceof Array; arrr instanceof Array; obj instanceof Array; objj instanceof Array;