For example, how could I find the positions that contain the value 20 in the following 2D array?
let nested_array = [ [17, 16, 15, 14, 13], [18, 5, 4, 3, 12], [19, 6, 1, 2, 11], [20, 7, 8, 9, 10], [21, 20, 23, 24, 25],];Values might not be unique.