Q:17 - Shortest distance to a character

Given a string S and a character C, return an array of integers representing the shortest distance from the current character in S to C.

Notes
All letters will be lowercase.
If the string is empty, return an empty array.
If the character is not present, return an empty array.
Examples
shortest_to_char("lovecodewars", "e") == [3, 2, 1, 0, 1, 2, 1, 0, 1, 2, 3, 4]
shortest_to_char("aaaabbbb", "b") == [4, 3, 2, 1, 0, 0, 0, 0]
shortest_to_char("", "b") == []
shortest_to_char("abcde", "") == []