These arrays are too long! Let's reduce them!
Write a function that takes in an array of integers from 0-9, and returns a new array:
- Numbers with no identical numbers preceding or following it returns a 1:
2, 4, 9 => 1, 1, 1 - Sequential groups of identical numbers return their count:
6, 6, 6, 6 => 4
Example
[0, 4, 6, 8, 8, 8, 5, 5, 7] => [1, 1, 1, 3, 2, 1]
Your function should then repeat the process on the resulting array, and on the resulting array of that, until it returns a single integer:
[0, 4, 6, 8, 8, 8, 5, 5, 7] => [1, 1, 1, 3, 2, 1] => [3, 1, 1, 1] => [1, 3] => [1, 1] => [2]
When your function has reduced the array to a single integer following these rules, it should return that integer.
[2] => 2
- All test arrays will be 2+ in length
- All integers in the test arrays will be positive numbers from 0 to 9
- You should return an integer, not an array with 1 element
