Given an array of integers nums, implement a function that processes the array to return a new array containing only positive integers while also handling edge cases such as empty arrays, arrays with all negative numbers, and arrays with mixed types (e.g., strings, None). The function should return an empty array if no positive integers are present.
Example 1:
Input: nums = [1, -2, 3, 0, -5]
Output: [1, 3]
Example 2:
Input: nums = [-1, -2, -3]
Output: []
Example 3:
Input: nums = []
Output: []