Defines and enforces an array-based "path" convention.
A path is an array intended to be interpreted as a list of keys. Useful for nesting into javascript objects.
Valid input:
- a string (splits on periods);
- a number;
- an array (simply returned).
Invalid input returns an empty path.
makePath("id"); // ["id"]
makePath("users.0.name"); // ["users", "0", "name"]
makePath(1); // [1]
makePath(["foo", "bar"]); // ["foo", "bar"]
makePath({foo:"bar"}); // []1.0.1 - Invalid input now returns an empty path.