Tell us what’s happening:
Expected output is not sorted.
substringDivisibility() should return [ 1430952867, 1460357289, 1406357289, 4130952867, 4160357289, 4106357289 ].
My code is returning [ 1406357289,
1430952867,
1460357289,
4106357289,
4130952867,
4160357289 ]
Please help me understand if there is any reason why the output is listed in this order. Also, review and comment how I can get the output in this order.
Your code so far
function substringDivisibility() {
var nums = [0,9,8,7,6,5,4,3,2,1];
//var nums = [ 1, 4, 0, 6, 3, 5, 2, 7, 8, 9 ];
//var nums = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ];
var result = [];
// Run the algorithm until count is equal to n
while (!inReverseOrder(nums)) {
var i = nums.length - 1;
while (nums[i - 1] >= nums[i])
i = i - 1;
var j = nums.length;
while (nums[j - 1] <= nums[i - 1])
j = j - 1;
swap(nums, i - 1, j - 1);
i++;
j = nums.length;
while (i < j) {
swap(nums, i - 1, j - 1);
i++;
j--;
}
if (isSubDivisible(nums)) {
result.push(parseInt(nums.join("")));
}
}
return result;
}
function swap(arr, i, j) {
var temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
function inReverseOrder(arr) {
for (var i = 0, j = arr.length - 1; i < arr.length; i++, j--) {
if (arr[i] != j) {
return false;
}
}
return true;
}
function isSubDivisible(numbers) {
// d2d3d4 = 406 is divisible by 2
// d3d4d5 = 063 is divisible by 3
// d4d5d6 = 635 is divisible by 5
// d5d6d7 = 357 is divisible by 7
// d6d7d8 = 572 is divisible by 11
// d7d8d9 = 728 is divisible by 13
// d8d9d10 = 289 is divisible by 17
var d2d3d4 = numbers[1] * 100 + numbers[2] * 10 + numbers[3];
if (d2d3d4 % 2 != 0) {
return false;
}
var d3d4d5 = numbers[2] * 100 + numbers[3] * 10 + numbers[4];
if (d3d4d5 % 3 != 0) {
return false;
}
var d4d5d6 = numbers[3] * 100 + numbers[4] * 10 + numbers[5];
if (d4d5d6 % 5 != 0) {
return false;
}
var d5d6d7 = numbers[4] * 100 + numbers[5] * 10 + numbers[6];
if (d5d6d7 % 7 != 0) {
return false;
}
var d6d7d8 = numbers[5] * 100 + numbers[6] * 10 + numbers[7];
if (d6d7d8 % 11 != 0) {
return false;
}
var d7d8d9 = numbers[6] * 100 + numbers[7] * 10 + numbers[8];
if (d7d8d9 % 13 != 0) {
return false;
}
var d8d9d10 = numbers[7] * 100 + numbers[8] * 10 + numbers[9];
if (d8d9d10 % 17 != 0) {
return false;
}
return true;
}
console.log(substringDivisibility());
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Challenge: Problem 43: Sub-string divisibility
Link to the challenge: