Test case details

Preparation Code

var arr1 = []     var arr2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

Test cases

Test #1

arr1 = [0, 9, 8, 7, 6, 5, 4, 3, 2, 1]; arr1 = arr1.concat([1, 2, 3]);

Test #2

arr1 = [0, 9, 8, 7, 6, 5, 4, 3, 2, 1]; arr1.push(1); arr1.push(2); arr1.push(3);