# function assertEqual Hackish function for stupid comparison number str

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104``` ```function assertEqual(a, b) { /* Hackish function for stupid comparison number, strings and arrays */ if (a.toString() != b.toString()) { alert(a + ' != ' + b); } } function find_distance(a, b) { /* Find distance between a and b не учитывая замкнутость координат на сфере */ if ((a * b) > 0) { return Math.abs(a - b) } else { return Math.abs(a) + Math.abs(b) } } function find_clockwise_distance(a, b) { /* Find shortest distance between a and b учитывая замкнутость координат на сфере */ if (a < b) { return b - a } else { return find_distance(a, 180) + find_distance(-180, b); } } /* function find_real_distance(distance) { return Math.abs(Math.min(distance, 360 - distance)) } function test_find_real_distance() { assertEqual(find_real_distance(10), 10) assertEqual(find_real_distance(180), 180) assertEqual(find_real_distance(190), 170) } */ function find_min_distance(points) { /* Find the start and end points between all other points are placed and distance is minimal Return start, end and distance */ distance = 360 start = null end = null points.sort(function(a, b) { return a - b; }) for(x = 0; x < points.length; x++) { if (x == 0) { prev = points.length - 1 } else { prev = x - 1 } test_distance = find_clockwise_distance(points[x], points[prev]) if (test_distance < distance) { distance = test_distance start = points[x] end = points[prev] } } return [start, end, distance] } function test_min_distance() { assertEqual(find_min_distance([10, 20]), [10, 20, 10]) assertEqual(find_min_distance([10, -10]), [-10, 10, 20]) assertEqual(find_min_distance([170, -170]), [170, -170, 20]) assertEqual(find_min_distance([-170, 170]), [170, -170, 20]) assertEqual(find_min_distance([-170, 160, 170]), [160, -170, 30]) assertEqual(find_min_distance([-10, 10]), [-10, 10, 20]) } function test_find_clockwise_distance() { assertEqual(find_clockwise_distance(10, 20), 10) assertEqual(find_clockwise_distance(20, 10), 350) assertEqual(find_clockwise_distance(10, -20), 330) assertEqual(find_clockwise_distance(-20, 10), 30) assertEqual(find_clockwise_distance(-20, -30), 350) assertEqual(find_clockwise_distance(-40, -30), 10) } function test_find_distance() { assertEqual(find_distance(10, 20), 10) assertEqual(find_distance(-10, 20), 30) assertEqual(find_distance(20, -10), 30) assertEqual(find_distance(-10, -50), 40) assertEqual(find_distance(0, 5), 5) assertEqual(find_distance(0, -5), 5) } function run_tests() { test_find_distance(); test_find_clockwise_distance(); test_min_distance(); } ```